deploy Syncer to a2acloud Kubernetes

.gitea/workflows/build.yml

@@ -0,0 +1,29 @@
+name: build
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  image:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Build production image in Kubernetes
+        run: |
+          set -euo pipefail
+          image=registry.a2acloud.io/syncer/syncer
+          docker build --platform linux/amd64 --pull \
+            -t "$image:$GITHUB_SHA" \
+            -t "$image:latest" \
+            .
+
+      - name: Push immutable and release tags
+        run: |
+          set -euo pipefail
+          image=registry.a2acloud.io/syncer/syncer
+          docker push "$image:$GITHUB_SHA"
+          docker push "$image:latest"