Run CI checks through Docker target

.gitea/workflows/ci.yml

@@ -22,20 +22,8 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: '22'
-          cache: npm
-
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Lint
-        run: npm run lint
-
-      - name: Build app
-        run: npm run build
+      - name: Check app
+        run: docker build --target ci -t evil-wordle-ci .
 
       - name: Validate compose file
         run: docker compose config