Deploy: fix GHCR auth and compose warnings

- Pass RUNNER envs to remote SSH action so docker login ghcr.io works
- Remove obsolete `version` from docker-compose.prod.yml to avoid warnings

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

@@ -78,6 +78,8 @@ jobs:
           host: ${{ secrets.SERVER_HOST }}
           username: ${{ secrets.SERVER_USERNAME }}
           key: ${{ secrets.SSH_PRIVATE_KEY }}
+          # pass selected env vars to the remote shell so docker login works
+          envs: RUNNER_GITHUB_TOKEN,RUNNER_GH_ACTOR
           debug: true
           script: |
             cd /home/github-actions/codered-astra