chore: use ghcr.io image for production deployment

- Update prod docker-compose to pull from ghcr.io/xe138/grist-mcp-server
- Remove debug step from Gitea workflow

.gitea/workflows/release.yml

@@ -13,19 +13,6 @@ jobs:
   build:
     runs-on: ubuntu-docker
     steps:
-      - name: Debug environment
-        run: |
-          echo "=== Environment ==="
-          echo "PATH: $PATH"
-          echo "=== Looking for docker ==="
-          which docker || echo "docker not in PATH"
-          ls -la /usr/local/bin/ || echo "no /usr/local/bin"
-          ls -la /usr/bin/docker || echo "no /usr/bin/docker"
-          echo "=== Docker socket ==="
-          ls -la /var/run/docker.sock || echo "no docker socket"
-          echo "=== All binaries ==="
-          ls /usr/local/bin/ 2>/dev/null || true
-
       - name: Checkout repository
         run: |
           git clone --depth 1 --branch ${GITHUB_REF_NAME} ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}.git .

deploy/prod/docker-compose.yml

@@ -1,9 +1,7 @@
 # Production environment - resource limits, logging, restart policy
 services:
   grist-mcp:
-    build:
-      context: ../..
-      dockerfile: Dockerfile
+    image: ghcr.io/xe138/grist-mcp-server:latest
     ports:
       - "${PORT:-3000}:3000"
     volumes: