build: Fix start command for Keycloak setup in GitHub workflow.

.github/workflows/test_keycloak_integration.yaml

@@ -16,7 +16,7 @@ jobs:
           - 8080:8080
         options: >-
           --name keycloak
-          start
+          -e start
         env:
           KC_BOOTSTRAP_ADMIN_USERNAME: admin
           KC_BOOTSTRAP_ADMIN_PASSWORD: admin
@@ -57,14 +57,6 @@ jobs:
           KEYCLOAK_CLIENT_ID: my-client
           KEYCLOAK_CLIENT_SECRET: my-client-secret
 
-      - name: Run FastAPI application in the background
-        run: uvicorn main:app --host 0.0.0.0 --port 8000 &
-        env:
-          KEYCLOAK_SERVER_URL: http://localhost:8080/auth/
-          KEYCLOAK_REALM: test
-          KEYCLOAK_CLIENT_ID: my-client
-          KEYCLOAK_CLIENT_SECRET: my-client-secret
-
       - name: Install backup-restore server
         run: |
           pip install -e .