Add new Release Workflow using Github Actions and wangyoucao577/go-release-action

.github/workflows/release.yaml

@@ -0,0 +1,30 @@
+name: Release Go Binaries
+
+on: 
+  release:
+    types: [created]
+
+jobs:
+  releases-matrix:
+    name: Release Go Binary
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        goos: [freebsd, linux, windows]
+        goarch: ["386", amd64]
+    steps:
+    - uses: actions/checkout@v2
+    
+    - name: Set APP_VERSION env
+      run: echo APP_VERSION=$(echo ${GITHUB_REF} | rev | cut -d'/' -f 1 | rev ) >> ${GITHUB_ENV}
+    - name: Set BUILD_TIME env
+      run: echo BUILD_TIME=$(date) >> ${GITHUB_ENV}
+      
+    - uses: wangyoucao577/go-release-action@v1.14
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        goos: ${{ matrix.goos }}
+        goarch: ${{ matrix.goarch }}
+        goversion: "https://golang.org/dl/go1.15.8.linux-amd64.tar.gz"
+        extra_files: LICENSE README.md smtprelay.ini
+        ldflags: -s -w -X "main.appVersion=${{ env.APP_VERSION }}" -X "main.buildTime=${{ env.BUILD_TIME }}"