Migrate to GitHub Container Registry (#1155)

.github/workflows/docker.yml

@@ -1,6 +1,12 @@
 name: docker
 
-on: pull_request
+on:
+  push:
+    tags:
+      - v*.*.*
+  pull_request:
+    branches:
+      - master
 
 jobs:
   build:
@@ -10,7 +16,22 @@ jobs:
       uses: actions/checkout@v2
       with:
         submodules: true
-    - name: docker build
-      run: docker build -t terraform-linters/tflint .
+    - name: Docker meta
+      id: meta
+      uses: docker/metadata-action@v3
+      with:
+        images: ghcr.io/${{ github.repository }}
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - name: Build and push
+      uses: docker/build-push-action@v2
+      with:
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
     - name: docker run
-      run: docker run terraform-linters/tflint -v
+      run: docker run ghcr.io/${{ github.repository }}:${{ steps.meta.outputs.version }} -v

README.md

@@ -2,7 +2,6 @@
 [![Build Status](https://github.com/terraform-linters/tflint/workflows/build/badge.svg?branch=master)](https://github.com/terraform-linters/tflint/actions)
 [![GitHub release](https://img.shields.io/github/release/terraform-linters/tflint.svg)](https://github.com/terraform-linters/tflint/releases/latest)
 [![Terraform Compatibility](https://img.shields.io/badge/terraform-%3E%3D%200.12-blue)](docs/user-guide/compatibility.md)
-[![Docker Hub](https://img.shields.io/badge/docker-ready-blue.svg)](https://hub.docker.com/r/wata727/tflint/)
 [![License: MPL 2.0](https://img.shields.io/badge/License-MPL%202.0-blue.svg)](LICENSE)
 [![Go Report Card](https://goreportcard.com/badge/github.com/terraform-linters/tflint)](https://goreportcard.com/report/github.com/terraform-linters/tflint)
 [![Homebrew](https://img.shields.io/badge/dynamic/json.svg?url=https://formulae.brew.sh/api/formula/tflint.json&query=$.versions.stable&label=homebrew)](https://formulae.brew.sh/formula/tflint)
@@ -40,7 +39,7 @@ choco install tflint
 Docker:
 
 ```console
-$ docker run --rm -v $(pwd):/data -t wata727/tflint
+$ docker run --rm -v $(pwd):/data -t ghcr.io/terraform-linters/tflint
 ```
 
 Please note that this Docker image is not suitable for production CI/CD pipelines.