rm db/* instead of rm db && mkdir db

.github/workflows/startup-tests.yml

@@ -123,8 +123,7 @@ jobs:
         run: pnpm exec playwright install
       - name: Build the Docker app
         run: |
-          rm -rf db
-          mkdir db
+          rm -rf db/*
           docker compose -f docker-compose-build.yml up -d
       - name: Create backend environment variables file
         working-directory: ${{ env.backend-directory }}