fix: add Harbor login step in CI workflow

.gitea/workflows/build.yml

@@ -49,6 +49,11 @@ jobs:
         env:
           GITHUB_SHA: ${{ github.sha }}
 
+      - name: Login to Harbor
+        run: docker login 192.168.1.212:1180 -u admin -p "$HARBOR_PASSWORD"
+        env:
+          HARBOR_PASSWORD: ${{ secrets.HARBOR_PASSWORD }}
+
       - name: Docker build & push
         run: |
           cd /root/.cache/demo-frontend
@@ -61,6 +66,7 @@ jobs:
           echo "✓ Pushed ${TAG}"
         env:
           GITHUB_SHA: ${{ github.sha }}
+          REGISTRY: ${{ env.REGISTRY }}
 
       - name: Patch ArgoCD
         run: |