feat: backend ci

Author: andreishket

.github/workflows/backend.yml

@@ -13,6 +13,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Set up Docker BuildKit
+        run: echo "DOCKER_BUILDKIT=1" >> $GITHUB_ENV
+
       - name: Build and run tests
         run: |
           cd server/workers/persistence