setup release workflow

.github/workflows/release.yml

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+name: release
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      -
+        name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.15
+      -
+        name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v2
+        with:
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

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+before:
+  hooks:
+    - go mod download
+builds:
+  - id: coredns
+    main: ./cmd/coredns/main.go
+    binary: coredns
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+    goarch:
+      - amd64
+      - 386
+      - arm
+      - arm64
+
+  - id: wgsd-client
+    main: ./cmd/wgsd-client/main.go
+    binary: wgsd-client
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+    goarch:
+      - amd64
+      - 386
+      - arm
+      - arm64