make sure to install deps when linting

.github/workflows/docker-publish.yaml

@@ -33,6 +33,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install pylint
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
       - name: Analysing the code with pylint
         run: |
           pylint main.py