Setup dependabot and CI

.github/dependabot.yml

@@ -0,0 +1,9 @@
+version: 2
+
+updates:
+  - package-ecosystem: 'npm'
+    directory: '/'
+    schedule:
+      interval: 'weekly'
+    versioning-strategy: 'increase-if-necessary'
+    open-pull-requests-limit: 20

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    name: Check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out branch
+        uses: actions/checkout@v4
+
+      - name: Cache .npm
+        uses: actions/cache@v4
+        env:
+          cache-name: cache-dot-npm
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-build-${{ env.cache-name }}
+
+      - name: Set up Node.js version
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run Check
+        run: npm run check

package.json

@@ -6,6 +6,7 @@
     "dev": "astro dev",
     "start": "astro dev",
     "build": "astro check && astro build",
+    "check": "astro check",
     "preview": "astro preview",
     "astro": "astro"
   },