Add creation of empty secret file

.github/workflows/test.yaml

@@ -9,6 +9,10 @@ jobs:
       - uses: actions/checkout@v3
       - name: Build Docker image
         run: make dockerimage
+      - name: Create placeholder secrets
+        run: |
+          mkdir ./secrets
+          echo "{}" >> ./secrets/screenshots-uploader.json
       - name: Run tests in Docker image
         run: make test
       # - name: Set up Python ${{ matrix.python-version }}