ci: add release workflow

.github/workflows/build.yml

@@ -0,0 +1,30 @@
+on:
+  release:
+    types: [created]
+
+jobs:
+  releases-matrix:
+    name: Release Go Binary
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # build and publish in parallel: linux/386, linux/amd64, windows/386, windows/amd64, darwin/386, darwin/amd64
+        goos: [linux, windows, darwin]
+        goarch: [386, amd64]
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v2
+      - name: Find Go version
+        run: awk '$1=="go"{print $2}' go.mod | xargs -I {} echo "::set-output name=version::{}"
+        id: go_mod
+      - name: Find release tag
+        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+      - name: Build versions
+        uses: wangyoucao577/[email protected]
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          goos: ${{ matrix.goos }}
+          goarch: ${{ matrix.goarch }}
+          goversion: ${{ steps.go_mod.outputs.version }}
+          ldflags: -X "main.version=${{ env.RELEASE_VERSION }}"
+          extra_files: LICENSE