build: create release when tag pushed.

.github/workflows/release.yml

@@ -0,0 +1,27 @@
+name: release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build:
+    runs-on: windows-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: v1.17
+
+      - name: Build
+        run: |
+          go build -ldflags="-X main.tagName=$(git describe --tags --abbrev=0) -X main.sha=$(git rev-parse --short HEAD) -H=windowsgui" -o dist/
+
+      - uses: ncipollo/release-action@v1
+        with:
+          artifacts: "dist/*.exe"
+          token: ${{ secrets.GITHUB_TOKEN }}