made the docker image lighter and changed the video codec

.gitea/workflows/deploy.yaml

@@ -6,6 +6,9 @@ jobs:
   copy:
     runs-on: ubuntu-latest
     steps:
+      - name: Test if destination directory variable is set
+        if: ${{vars.DESTINATION_DIR == '' }}
+        run: exit 1
       - name: Configure SSH
         run: |
           mkdir -p ~/.ssh/