Update connection string for supabase in GitHub Actions workflow

Author: webstackdev

.github/workflows/build-and-test.yml

@@ -105,6 +105,7 @@ jobs:
           SUPABASE_HEALTH_TIMEOUT=${SUPABASE_HEALTH_TIMEOUT:-240}
           SUPABASE_URL=${SUPABASE_URL:-http://127.0.0.1:54321}
           SUPABASE_SERVICE_ROLE_KEY=${SUPABASE_SERVICE_ROLE_KEY}
+          SUPABASE_DB_URL=${SUPABASE_DB_URL:-postgresql://postgres:postgres@127.0.0.1:54322/postgres}
           EOF
 
       - name: Start mock containers