Add CI and release workflows

.gitea/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Test
+        run: npm test
+
+      # The app is static files, so a broken manifest or service worker only shows up on a phone.
+      - name: Manifest and scripts parse
+        run: |
+          node -e "JSON.parse(require('fs').readFileSync('public/manifest.webmanifest','utf8'))"
+          for f in public/*.js; do node --check "$f"; done