ci: add build & lint workflow; fix deploy errors

.github/workflows/ci.yml

@@ -0,0 +1,49 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ '**' ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+env:
+  NODE_VERSION: 20
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Use Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build project
+        run: npm run build
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Use Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint project
+        run: npm run lint

.github/workflows/deploy.yml

@@ -21,6 +21,9 @@ concurrency:
   group: "pages"
   cancel-in-progress: false
 
+env:
+  NODE_VERSION: 20
+
 jobs:
   # Single deploy job since we're just deploying
   deploy:
@@ -32,11 +35,11 @@ jobs:
       - name: Use Node.js 20
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: ${{ env.NODE_VERSION }}
 
       - name: Build
         run: |
-          npm install
+          npm ci
           npm run build
 
       - name: Upload artifact

eslint.config.mjs

@@ -0,0 +1,12 @@
+// @ts-check
+
+// @ts-ignore
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+    eslint.configs.recommended,
+    ...tseslint.configs.strict,
+    ...tseslint.configs.stylistic,
+    ...tseslint.configs.recommended,
+);