ci: add docker image release

Signed-off-by: peefy <[email protected]>

.github/workflows/release.yaml

@@ -0,0 +1,48 @@
+# Reference from:
+# https://goreleaser.com/ci/actions/
+name: Release
+on:
+  push:
+    tags:
+      - "v*"
+permissions:
+  contents: write
+jobs:
+  image-amd64:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.22
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: v0.11.2
+          install: true
+
+      # <--- Login, build and push image to Docker Hub --->
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: kcllang/kpt-kcl
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

README.md

@@ -20,7 +20,7 @@ The KCL programming language can be used to:
 
 + Install [kpt](https://github.com/GoogleContainerTools/kpt)
 + Install [Docker](https://www.docker.com/)
-+ Golang (at least version 1.21)
++ Golang (at least version 1.22)
 
 ## Test the KRM function
 

VERSION

@@ -1 +1 @@
-v0.4.0
+0.9.0