Add test workflow on push

.github/workflows/test.yaml

@@ -0,0 +1,23 @@
+name: Run lint and tests
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm run build --if-present
+    - run: npm run lint-test
+    - run: npm test

package.json

@@ -28,7 +28,8 @@
     "start": "DEBUG=cyberchef-server:server node -r esm ./bin/www",
     "test": "mocha -r esm",
     "prod": "NODE_ENV=production node -r esm ./bin/www",
-    "lint": "./node_modules/.bin/eslint --fix ."
+    "lint": "./node_modules/.bin/eslint --fix .",
+    "lint-test": "./node_modules/.bin/eslint ."
   },
   "dependencies": {
     "cookie-parser": "~1.4.4",