add a workflow to build the binary and use the GH action (#20)

.github/workflows/main.yml

@@ -0,0 +1,35 @@
+name: build-binary
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    permissions:
+        id-token: write
+        packages: write
+        contents: write
+    runs-on: ubuntu-latest
+    steps:
+        - name: Check out code
+          uses: actions/checkout@v4
+        - name: Set up Go
+          uses: actions/setup-go@v5
+          with:
+            go-version: '1.21'
+        - name: Run Go build
+          run: |
+            go build -v -o demo-go ./...
+        - name: Sign artifact
+          uses: github-early-access/generate-build-provenance@main
+          with:
+            subject-path: '${{ github.workspace }}/demo-go'
+        - name: Upload artifact
+          uses: actions/upload-artifact@v3
+          with:
+            name: demo-go-binary
+            path: demo-go