add release workflow

Author: FGasper

.github/workflows/release.yml

@@ -0,0 +1,54 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+env:
+  ARCH: ["amd64", "arm64"]
+
+permissions:
+  contents: write
+
+jobs:
+  build-and-release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # NB: actions/checkout quietly fetches all tags as lightweight tags,
+      # even if they’re annotated upstream. That, of course, prevents use
+      # of the tag message as release notes. This works around that.
+      #
+      # See https://github.com/actions/checkout/issues/290 for details.
+      - name: Fetch tags
+        run: git fetch --tags --force
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+
+      - name: Build
+        run: |
+          set -o errexit
+
+          TAG_NAME=$(git describe --exact-match)
+          git tag --list --format='%(contents)' "$TAG_NAME" > RELEASE-NOTES
+
+          for arch in $ARCH; do
+            docker build . \
+              --platform "linux/$ARCH" \
+              --output "type=docker,dest=${{ github.repository_name }}-$TAG_NAME-$ARCH.tar"
+          done
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          body_path: RELEASE-NOTES
+          files: *.tar