diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
new file mode 100644
index 000000000..faa1282f3
--- /dev/null
+++ b/.github/workflows/check.yml
@@ -0,0 +1,102 @@
+name: check
+on: [push]
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}/e2e
+  BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
+jobs:
+  lint:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - run: npm ci
+        working-directory: react
+      - run: npx eslint .
+        working-directory: react
+
+  build-and-push-image:
+    runs-on: ubuntu-22.04
+    outputs:
+      image_tag: ${{ steps.meta.outputs.tags }}
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: react/test/Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=registry,ref=${{ steps.meta.outputs.tags }}
+          cache-to: type=inline
+
+  build-frontend:
+    runs-on: ubuntu-22.04
+    needs: build-and-push-image
+    container:
+      image: ghcr.io/${{ needs.build-and-push-image.outputs.image_tag }}
+    steps:
+      - uses: actions/checkout@v4
+      - run: python3 create_website.py react/test/density-db --no-data --no-geo --no-juxta
+      - uses: actions/upload-artifact@v4
+        with:
+          name: frontend-build
+          path: react/test/density-db
+
+  list-e2e-tests:
+    runs-on: ubuntu-22.04
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@v4
+      - id: set-matrix
+        run: echo "matrix=$(find . -name '*_test.js' | jq -R -s -c 'split("\n")[:-1]')" >> $GITHUB_OUTPUT
+        working-directory: react/test
+
+  run-e2e-tests:
+    runs-on: ubuntu-22.04
+    needs: [build-and-push-image, build-frontend, list-e2e-tests]
+    container:
+      image: ghcr.io/${{ needs.build-and-push-image.outputs.image_tag }}
+    strategy:
+      fail-fast: false
+      matrix:
+        test-file: ${{ fromJson(needs.list-e2e-tests.outputs.matrix) }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/download-artifact@v4
+        with:
+          name: frontend-build
+          path: react/test/density-db
+      - name: Run tests
+        run: |
+          # Start display subsystem to browser can run
+          Xvfb :10 -ac &
+          export DISPLAY=:10
+          fluxbox >/dev/null 2>&1 & # needed for window resizing in Testcafe
+          npm ci
+          npx ts-node test/ci_proxy.ts &
+          npx testcafe -e chromium test/${{ matrix.test-file }}
+        working-directory: react
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
deleted file mode 100644
index 9ba77a076..000000000
--- a/.github/workflows/lint.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-name: lint
-on: [push]
-jobs:
-  lint:
-    runs-on: ubuntu-22.04
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 20
-      - run: npm ci
-        working-directory: react
-      - run: npx eslint .
-        working-directory: react
diff --git a/.gitignore b/.gitignore
index c12933bbd..7842e891e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ dist
 .vscode
 *Copy1.ipynb*
 .DS_Store
+react/test/density-db
diff --git a/README.md b/README.md
index 1fd7b3fad..0106771d0 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,9 @@
-
 # urbanstats
 
 A tool for viewing statistics of various areas in the United States.
 
 Currently live at [urbanstats.org](https://urbanstats.org/).
 
-
 # Build instructions
 
 Very incomplete, I started documenting this halfway through. Note that I have only successfully built the backend on py37, there's a lot of packages pinned to older versions since the caching relies on unpickling the data.
@@ -13,7 +11,7 @@ Very incomplete, I started documenting this halfway through. Note that I have on
 ```
 conda install -c conda-forge cfgrib
 pip install -r requirements.txt
-cd react; npm i; cd ..
+cd react; npm ci; cd ..
 ```
 
 You will want to clone the site repository to some location, using a shallow clone
diff --git a/create_website.py b/create_website.py
index 6b810c47a..38c3e0093 100644
--- a/create_website.py
+++ b/create_website.py
@@ -320,7 +320,7 @@ def main(
     with open(f"react/src/data/american_to_international.json", "w") as f:
         json.dump(american_to_international, f)
 
-    os.system(f"cd react; npm i; npm run {'dev' if dev else 'prod'}")
+    os.system(f"cd react; npm ci; npm run {'dev' if dev else 'prod'}")
     shutil.rmtree(f"{site_folder}/scripts")
     shutil.copytree("dist", f"{site_folder}/scripts")
     place_icons_in_site_folder(site_folder)
diff --git a/react/package-lock.json b/react/package-lock.json
index aee35957d..1fe0b81b8 100644
--- a/react/package-lock.json
+++ b/react/package-lock.json
@@ -41,6 +41,8 @@
         "@eslint/js": "^9.8.0",
         "@types/dom-to-image": "^2.6.7",
         "@types/eslint__js": "^8.42.3",
+        "@types/express": "^4.17.21",
+        "@types/express-http-proxy": "^1.6.6",
         "@types/file-saver": "^2.0.7",
         "@types/leaflet": "^1.9.8",
         "@types/react": "^18.2.61",
@@ -50,11 +52,14 @@
         "css-loader": "^6.8.1",
         "downloads-folder": "^3.0.3",
         "eslint": "^9.8.0",
+        "express": "^4.19.2",
+        "express-http-proxy": "^2.1.1",
         "protobufjs-cli": "^1.1.1",
         "source-map-loader": "^4.0.1",
         "style-loader": "^3.3.1",
         "testcafe": "^3.5.0",
         "ts-loader": "^9.4.2",
+        "ts-node": "^10.9.2",
         "typescript": "^5.5.4",
         "typescript-eslint": "^8.0.1",
         "webpack": "^5.88.2",
@@ -2019,6 +2024,28 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@cspotcode/source-map-support": {
+      "version": "0.8.1",
+      "resolved": "https://registry.npmjs.org/@cspotcode/source-map-support/-/source-map-support-0.8.1.tgz",
+      "integrity": "sha512-IchNf6dN4tHoMFIn/7OE8LWZ19Y6q/67Bmf6vnGREv8RSbBVb9LPJxEcnwrcwX6ixSvaiGoomAUvu4YSxXrVgw==",
+      "dev": true,
+      "dependencies": {
+        "@jridgewell/trace-mapping": "0.3.9"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/@cspotcode/source-map-support/node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.9",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.9.tgz",
+      "integrity": "sha512-3Belt6tdc8bPgAtbcmdtNJlirVoTmEb5e2gC94PnkwEW9jI6CAHUeoG85tjWP5WquqfavoMtMwiG4P926ZKKuQ==",
+      "dev": true,
+      "dependencies": {
+        "@jridgewell/resolve-uri": "^3.0.3",
+        "@jridgewell/sourcemap-codec": "^1.4.10"
+      }
+    },
     "node_modules/@devexpress/bin-v8-flags-filter": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/@devexpress/bin-v8-flags-filter/-/bin-v8-flags-filter-1.3.0.tgz",
@@ -2547,6 +2574,30 @@
       "resolved": "https://registry.npmjs.org/@protobufjs/utf8/-/utf8-1.1.0.tgz",
       "integrity": "sha512-Vvn3zZrhQZkkBE8LSuW3em98c0FwgO4nxzv6OdSxPKJIEKY2bGbHn+mhGIPerzI4twdxaP8/0+06HBpwf345Lw=="
     },
+    "node_modules/@tsconfig/node10": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/@tsconfig/node10/-/node10-1.0.11.tgz",
+      "integrity": "sha512-DcRjDCujK/kCk/cUe8Xz8ZSpm8mS3mNNpta+jGCA6USEDfktlNvm1+IuZ9eTcDbNk41BHwpHHeW+N1lKCz4zOw==",
+      "dev": true
+    },
+    "node_modules/@tsconfig/node12": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/@tsconfig/node12/-/node12-1.0.11.tgz",
+      "integrity": "sha512-cqefuRsh12pWyGsIoBKJA9luFu3mRxCA+ORZvA4ktLSzIuCUtWVxGIuXigEwO5/ywWFMZ2QEGKWvkZG1zDMTag==",
+      "dev": true
+    },
+    "node_modules/@tsconfig/node14": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@tsconfig/node14/-/node14-1.0.3.tgz",
+      "integrity": "sha512-ysT8mhdixWK6Hw3i1V2AeRqZ5WfXg1G43mqoYlM2nc6388Fq5jcXyr5mRsqViLx/GJYdoL0bfXD8nmF+Zn/Iow==",
+      "dev": true
+    },
+    "node_modules/@tsconfig/node16": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@tsconfig/node16/-/node16-1.0.4.tgz",
+      "integrity": "sha512-vxhUy4J8lyeyinH7Azl1pdd43GJhZH/tP2weN8TntQblOY+A0XbT8DJk1/oCPuOOyg/Ja757rG0CgHcWC8OfMA==",
+      "dev": true
+    },
     "node_modules/@types/body-parser": {
       "version": "1.19.2",
       "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.2.tgz",
@@ -2624,9 +2675,9 @@
       "integrity": "sha512-LG4opVs2ANWZ1TJoKc937iMmNstM/d0ae1vNbnBvBhqCSezgVUOzcLCqbI5elV8Vy6WKwKjaqR+zO9VKirBBCA=="
     },
     "node_modules/@types/express": {
-      "version": "4.17.17",
-      "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.17.tgz",
-      "integrity": "sha512-Q4FmmuLGBG58btUnfS1c1r/NQdlp3DMfGDGig8WhfpA2YRUtEkxAjkZb0yvplJGYdF1fsQ81iMDcH24sSCNC/Q==",
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.21.tgz",
+      "integrity": "sha512-ejlPM315qwLpaQlQDTjPdsUFSc6ZsP4AN6AlWnogPjQ7CVi7PYF3YVz+CY3jE2pwYf7E/7HlDAN0rV2GxTG0HQ==",
       "dev": true,
       "dependencies": {
         "@types/body-parser": "*",
@@ -2635,6 +2686,15 @@
         "@types/serve-static": "*"
       }
     },
+    "node_modules/@types/express-http-proxy": {
+      "version": "1.6.6",
+      "resolved": "https://registry.npmjs.org/@types/express-http-proxy/-/express-http-proxy-1.6.6.tgz",
+      "integrity": "sha512-J8ZqHG76rq1UB716IZ3RCmUhg406pbWxsM3oFCFccl5xlWUPzoR4if6Og/cE4juK8emH0H9quZa5ltn6ZdmQJg==",
+      "dev": true,
+      "dependencies": {
+        "@types/express": "*"
+      }
+    },
     "node_modules/@types/express-serve-static-core": {
       "version": "4.17.35",
       "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-4.17.35.tgz",
@@ -3325,6 +3385,18 @@
         "acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
       }
     },
+    "node_modules/acorn-walk": {
+      "version": "8.3.3",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-8.3.3.tgz",
+      "integrity": "sha512-MxXdReSRhGO7VlFe1bRG/oI7/mdLV9B9JJT0N8vZOhF7gFRR5l3M8W9G8JxmKV+JC5mGqJ0QvqfSOLsCPa4nUw==",
+      "dev": true,
+      "dependencies": {
+        "acorn": "^8.11.0"
+      },
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
     "node_modules/aggregate-error": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.1.0.tgz",
@@ -3516,6 +3588,12 @@
         "safe-buffer": "~5.1.0"
       }
     },
+    "node_modules/arg": {
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/arg/-/arg-4.1.3.tgz",
+      "integrity": "sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA==",
+      "dev": true
+    },
     "node_modules/argparse": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
@@ -3821,13 +3899,13 @@
       "integrity": "sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ=="
     },
     "node_modules/body-parser": {
-      "version": "1.20.1",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.1.tgz",
-      "integrity": "sha512-jWi7abTbYwajOytWCQc37VulmWiRae5RyTpaCyDcS5/lMdtwSz5lOpDE67srw/HYe35f1z3fDQw+3txg7gNtWw==",
+      "version": "1.20.2",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.2.tgz",
+      "integrity": "sha512-ml9pReCu3M61kGlqoTm2umSXTlRTuGTx0bfYj+uIUKKYycG5NtSbeetV3faSU6R7ajOPw0g/J1PvK4qNy7s5bA==",
       "dev": true,
       "dependencies": {
         "bytes": "3.1.2",
-        "content-type": "~1.0.4",
+        "content-type": "~1.0.5",
         "debug": "2.6.9",
         "depd": "2.0.0",
         "destroy": "1.2.0",
@@ -3835,7 +3913,7 @@
         "iconv-lite": "0.4.24",
         "on-finished": "2.4.1",
         "qs": "6.11.0",
-        "raw-body": "2.5.1",
+        "raw-body": "2.5.2",
         "type-is": "~1.6.18",
         "unpipe": "1.0.0"
       },
@@ -4518,9 +4596,9 @@
       "dev": true
     },
     "node_modules/cookie": {
-      "version": "0.5.0",
-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.5.0.tgz",
-      "integrity": "sha512-YZ3GUyn/o8gfKJlnlX7g7xq4gyO6OSuhGPKaaGssGB2qgDUS0gPgtTvoyZLTt9Ab6dC4hfc9dV5arkvc/OCmrw==",
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.6.0.tgz",
+      "integrity": "sha512-U71cyTamuh1CRNCfpGY6to28lxvNwPG4Guz/EVjgf3Jmzv0vlDp1atT9eS5dDjMYHucpHbWns6Lwf3BKz6svdw==",
       "dev": true,
       "engines": {
         "node": ">= 0.6"
@@ -4590,6 +4668,12 @@
         "sha.js": "^2.4.8"
       }
     },
+    "node_modules/create-require": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/create-require/-/create-require-1.1.1.tgz",
+      "integrity": "sha512-dcKFX3jn0MpIaXjisoRvexIJVEKzaq7z2rZKxf+MSr9TkdmHmsU4m2lcLojrj/FHl8mk5VxMmYA+ftRkP/3oKQ==",
+      "dev": true
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
@@ -5224,6 +5308,12 @@
       "resolved": "https://registry.npmjs.org/es6-object-assign/-/es6-object-assign-1.1.0.tgz",
       "integrity": "sha512-MEl9uirslVwqQU369iHNWZXsI8yaZYGg/D65aOgZkeyFJwHYSxilf7rQzXKI7DdDuBPrBXbfk3sl9hJhmd5AUw=="
     },
+    "node_modules/es6-promise": {
+      "version": "4.2.8",
+      "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.8.tgz",
+      "integrity": "sha512-HJDGx5daxeIvxdBxvG2cb9g4tEvwIk3i8+nhX0yGrYmZUzbkdg8QbDevheDB8gd0//uPj4c1EQua8Q+MViT0/w==",
+      "dev": true
+    },
     "node_modules/escalade": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
@@ -5855,17 +5945,17 @@
       "integrity": "sha512-4EMSHGOPSwAfBiibw3ndnP0AvjDWLsMvGOvWEZ2F96IGk0bIVdjQisOHxReSkE13mHcfbuCiXw+G4y0zv6N8Eg=="
     },
     "node_modules/express": {
-      "version": "4.18.2",
-      "resolved": "https://registry.npmjs.org/express/-/express-4.18.2.tgz",
-      "integrity": "sha512-5/PsL6iGPdfQ/lKM1UuielYgv3BUoJfz1aUwU9vHZ+J7gyvwdQXFEBIEIaxeGf0GIcreATNyBExtalisDbuMqQ==",
+      "version": "4.19.2",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.19.2.tgz",
+      "integrity": "sha512-5T6nhjsT+EOMzuck8JjBHARTHfMht0POzlA60WV2pMD3gyXw2LZnZ+ueGdNxG+0calOJcWKbpFcuzLZ91YWq9Q==",
       "dev": true,
       "dependencies": {
         "accepts": "~1.3.8",
         "array-flatten": "1.1.1",
-        "body-parser": "1.20.1",
+        "body-parser": "1.20.2",
         "content-disposition": "0.5.4",
         "content-type": "~1.0.4",
-        "cookie": "0.5.0",
+        "cookie": "0.6.0",
         "cookie-signature": "1.0.6",
         "debug": "2.6.9",
         "depd": "2.0.0",
@@ -5896,6 +5986,29 @@
         "node": ">= 0.10.0"
       }
     },
+    "node_modules/express-http-proxy": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/express-http-proxy/-/express-http-proxy-2.1.1.tgz",
+      "integrity": "sha512-4aRQRqDQU7qNPV5av0/hLcyc0guB9UP71nCYrQEYml7YphTo8tmWf3nDZWdTJMMjFikyz9xKXaURor7Chygdwg==",
+      "dev": true,
+      "dependencies": {
+        "debug": "^3.0.1",
+        "es6-promise": "^4.1.1",
+        "raw-body": "^2.3.0"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/express-http-proxy/node_modules/debug": {
+      "version": "3.2.7",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.7.tgz",
+      "integrity": "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==",
+      "dev": true,
+      "dependencies": {
+        "ms": "^2.1.1"
+      }
+    },
     "node_modules/express/node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
@@ -7765,6 +7878,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/make-error": {
+      "version": "1.3.6",
+      "resolved": "https://registry.npmjs.org/make-error/-/make-error-1.3.6.tgz",
+      "integrity": "sha512-s8UhlNe7vPKomQhC1qFelMokr/Sc3AgNbso3n74mVPA5LTZwkB9NlXf4XPamLxJE8h0gh73rM94xvwRT2CVInw==",
+      "dev": true
+    },
     "node_modules/markdown-it": {
       "version": "12.3.2",
       "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-12.3.2.tgz",
@@ -9217,9 +9336,9 @@
       }
     },
     "node_modules/raw-body": {
-      "version": "2.5.1",
-      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.5.1.tgz",
-      "integrity": "sha512-qqJBtEyVgS0ZmPGdCFPWJ3FreoqvG4MVQln/kCgF7Olq95IbOp0/BWyMwbdtn4VTvkM8Y7khCQ2Xgk/tcrCXig==",
+      "version": "2.5.2",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.5.2.tgz",
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@@ -14324,6 +14546,15 @@
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@@ -15865,6 +16111,12 @@
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@@ -16889,6 +17147,28 @@
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@@ -18282,6 +18562,12 @@
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@@ -21222,6 +21508,27 @@
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+      "requires": {
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+        "@tsconfig/node10": "^1.0.7",
+        "@tsconfig/node12": "^1.0.7",
+        "@tsconfig/node14": "^1.0.0",
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diff --git a/react/package.json b/react/package.json
index a223bad49..2445a1b72 100644
--- a/react/package.json
+++ b/react/package.json
@@ -21,6 +21,8 @@
     "@eslint/js": "^9.8.0",
     "@types/dom-to-image": "^2.6.7",
     "@types/eslint__js": "^8.42.3",
+    "@types/express": "^4.17.21",
+    "@types/express-http-proxy": "^1.6.6",
     "@types/file-saver": "^2.0.7",
     "@types/leaflet": "^1.9.8",
     "@types/react": "^18.2.61",
@@ -30,11 +32,14 @@
     "css-loader": "^6.8.1",
     "downloads-folder": "^3.0.3",
     "eslint": "^9.8.0",
+    "express": "^4.19.2",
+    "express-http-proxy": "^2.1.1",
     "protobufjs-cli": "^1.1.1",
     "source-map-loader": "^4.0.1",
     "style-loader": "^3.3.1",
     "testcafe": "^3.5.0",
     "ts-loader": "^9.4.2",
+    "ts-node": "^10.9.2",
     "typescript": "^5.5.4",
     "typescript-eslint": "^8.0.1",
     "webpack": "^5.88.2",
diff --git a/react/test/Dockerfile b/react/test/Dockerfile
new file mode 100644
index 000000000..4b4336e71
--- /dev/null
+++ b/react/test/Dockerfile
@@ -0,0 +1,23 @@
+# This version for compatibility with pandas
+FROM python:3.10
+
+# 😭
+RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
+RUN apt-get install -y nodejs
+
+RUN dpkg --add-architecture i386
+RUN apt-get -y update
+RUN apt-get -y install libgdal-dev
+
+RUN apt-get -y install chromium
+RUN apt-get -y install xvfb
+
+# needed for window resizing in Testcafe
+RUN apt-get -y install libc6:i386
+RUN apt-get -y install libx11-6:i386
+RUN apt-get -y install fluxbox
+
+COPY ./requirements.txt ./
+RUN pip3 install --break-system-packages -r requirements.txt
+
+ENTRYPOINT [ "/bin/bash" ] 
\ No newline at end of file
diff --git a/react/test/ci_proxy.ts b/react/test/ci_proxy.ts
new file mode 100644
index 000000000..ea7f63e38
--- /dev/null
+++ b/react/test/ci_proxy.ts
@@ -0,0 +1,48 @@
+/**
+ * On the test CI, we want to have multiple test runners in parallel.
+ * 
+ * However, pulling down the densitydb repo to run the tests against each time is expensive.
+ * 
+ * So, our strategy will be to serve the local files generated by generate_site.py, 
+ * and then any files not generated, we'll proxy the request to densitydb on Github.
+ */
+
+import express from 'express';
+import proxy from 'express-http-proxy';
+
+/**
+ * If the user is using a branch that also exists on densitydb, we should use it as well.
+ * 
+ * Otherwise, use `master`
+ */
+
+const branch = fetch(`https://github.com/densitydb/densitydb.github.io/tree/${process.env.BRANCH_NAME}`, { method: 'HEAD' }).then(response => {
+    switch (response.status) {
+        case 200:
+            return process.env.BRANCH_NAME!;
+        case 404:
+            return 'master';
+        default:
+            throw new Error(`Unknown response code for branch check: ${response.status}`)
+    }
+})
+
+const app = express();
+
+app.use(express.static('test/density-db'), proxy('https://raw.githubusercontent.com', {
+    async proxyReqPathResolver(req) {
+        return `/densitydb/densitydb.github.io/${await branch}${req.path}`
+    },
+    userResHeaderDecorator(headers, userReq) {
+        const fileExtension = userReq.path.match(/\.(.+)$/)?.[1]
+        const mimeType = fileExtension ? { 'html': 'text/html', 'js': 'text/javascript' }[fileExtension] : undefined
+        // eslint-disable-next-line @typescript-eslint/no-unused-vars
+        const { 'content-security-policy': _, ...filteredHeaders } = headers;
+        return {
+            ...filteredHeaders,
+            'content-type': mimeType ?? headers['content-type'],
+        }
+    },
+}))
+
+app.listen(8000);
diff --git a/requirements.txt b/requirements.txt
index cafea7d3b..499f38297 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,12 +14,12 @@ geopandas==0.10.2
 # pygeos being installed is ABSOLUTELY NECESSARY if you want
 # to be able to load old caches
 # if not included, you will get an error with unpickling.
-pygeos==0.12.0
+pygeos==0.14.0
 pandas==1.3.4
-numpy==1.19.4
+numpy==1.26.4
 permacache==3.7.2
 more_itertools
 cached_property
 scipy
-matplotlib==3.4.3
+matplotlib==3.5.3
 disjoint_union==0.4.4
\ No newline at end of file