Add Gitea Actions workflow for container builds; v2.0.44

Mirrors the existing .github/workflows/docker-publish.yml so Gitea
Actions picks it up from the standard .gitea/workflows/ location.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/docker-publish.yml

@@ -0,0 +1,64 @@
+name: Publish Container
+
+on:
+  push:
+    branches: ["main"]
+    tags: ["v*"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
+      - name: Install dependencies
+        run: npm ci --legacy-peer-deps
+
+      - name: Run production build
+        run: npm run build
+
+      - name: Log in to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.necloud.us
+          username: ${{ secrets.REGISTRY_USER }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: git.necloud.us/nate/siteforge
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=sha
+            type=ref,event=tag
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            COMMIT_SHA=${{ github.sha }}
+            BUILD_NUMBER=${{ github.run_number }}