CI: add build step to deploy workflow

- Clone from local Gitea instead of actions/checkout
- Build with legacy builder (DOCKER_BUILDKIT=0) for Docker mirror support
- Use npm China mirror (registry.npmmirror.com) in Dockerfile
- Combined npm install+build in single RUN step
- Removed stale proxy env vars

.gitea/workflows/deploy.yml

@@ -11,11 +11,12 @@ jobs:
     runs-on: ubuntu-latest
     container:
       volumes:
+        - /var/packages/ContainerManager/target/usr/bin/docker:/usr/bin/docker
         - /volume1/docker/nas-dashboard:/nas-dashboard
-      env:
-        HTTP_PROXY: ${{ secrets.PROXY_URL }}
-        HTTPS_PROXY: ${{ secrets.PROXY_URL }}
     steps:
+      - name: Checkout
+        run: git clone --depth 1 http://gitea:3000/jimmy/nas-tools.git .
+      - name: Build
+        run: DOCKER_BUILDKIT=0 docker build -t nas-dashboard:latest dashboard/
       - name: Deploy
-        run: |
-          docker compose -f /nas-dashboard/docker-compose.yml up -d --pull never
+        run: docker compose -f /nas-dashboard/docker-compose.yml up -d --pull never