ci: github actions workflow

.github/workflows/build.yml

@@ -0,0 +1,55 @@
+name: build
+on: [ push, pull_request ]
+jobs:
+  build:
+    strategy:
+      matrix:
+        go-version: [ 1.21.x ]
+        os: [ ubuntu-latest, macos-latest ]
+        include:
+          - os: ubuntu-latest
+            goos: linux
+          - os: macos-latest
+            goos: darwin
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v4
+        with:
+          go-version: ${{ matrix.go-version }}
+        id: go
+      - name: Test
+        run: go test -v ./...
+      - name: Build
+        env:
+          GOOS: ${{ matrix.goos }}
+          GOARCH: amd64
+          CGO_ENABLED: '0'
+        run: go build -a -ldflags='-w -s -extldflags "-static"' -o ./build/tagrelease-$GOOS-$GOARCH
+      - name: upload build artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: binaries
+          path: build/*
+
+  release:
+    needs: build
+    if: github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: download build artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: binaries
+      - name: list build artifacts
+        run: ls -l
+      - name: publish release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: |
+            build/*