chore: add deployment workflow for Shuttle in deploy.yml

.github/workflows/deploy.yml

@@ -0,0 +1,34 @@
+name: Deploy to Shuttle
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '22'
+
+      - name: Cache Node.js modules
+        uses: actions/cache@v3
+        with:
+          path: ~/.npm
+          key: ${{ runner.OS }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.OS }}-node-
+
+      - name: Build Frontend
+        run: |
+          cd frontend
+          npm ci
+          ng build
+
+      - uses: shuttle-hq/deploy-action@v0.4.0
+        with:
+          deploy-key: ${{ secrets.SHUTTLE_API_KEY }}