ci: add Dockerfile and GHCR multi-arch publish workflow

self-hosted/.github/workflows/test.yml

@@ -0,0 +1,29 @@
+name: test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.22'
+          cache: true
+
+      - name: vet
+        run: go vet ./...
+
+      - name: test
+        run: go test -race -cover ./...
+
+      - name: build
+        run: go build ./...