Add wait for port

Author: lvarin

.github/workflows/checks.yaml

@@ -49,7 +49,7 @@ jobs:
       - name: Deploy app
         run: docker-compose up -d --build
       - name: Wait for app startup
-        run: while ! $(curl localhost:8080 -so /dev/null); do echo "Waiting for the app to be up..."; sleep 5; done
+        run: while ! $(curl localhost:8080); do echo "Waiting for the app to be up..."; sleep 5; done
       - name: Run integration tests
         shell: bash
         run: pytest tests/test_integration