ci: clean preview environment on pr close

.github/workflows/cleanup-preview.yml

@@ -0,0 +1,35 @@
+name: Clean up Preview
+
+on:
+  pull_request:
+    types: [closed]
+
+jobs:
+  delete-preview:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 20
+
+      - uses: pnpm/action-setup@v3
+        with:
+          version: 8
+          run_install: false
+
+      - name: Delete Neon Branch
+        uses: neondatabase/[email protected]
+        with:
+          project_id: ${{ secrets.NEON_PROJECT_ID }}
+          branch: preview/pr-${{ github.event.number }}-${{ github.event.pull_request.head.ref }}
+          api_key: ${{ secrets.NEON_API_KEY }}
+
+      - name: Install Vercel CLI
+        run: pnpm i -g vercel@latest
+
+      - name: Delete Vercel Environment Information
+        run: |
+          vercel env rm DATABASE_URL preview ${{ steps.branch-name.outputs.current_branch }} --token=${{ secrets.VERCEL_TOKEN }}
+          vercel env rm DIRECT_DATABASE_URL preview ${{ steps.branch-name.outputs.current_branch }} --token=${{ secrets.VERCEL_TOKEN }}
+