Initial commit - but way too late.

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: ci
+
+on:
+  pull_request:
+  push:
+    branches: ["main"]
+
+jobs:
+  site:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: site
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "24"
+          cache: "npm"
+          cache-dependency-path: site/package-lock.json
+      - run: npm ci
+      - run: npm run typecheck
+      - run: npm run format:check
+      - run: npm test
+      - run: npm run build