Add github workflow

.github/workflows/build-image.yml

@@ -0,0 +1,67 @@
+name: build-image
+
+on:
+  push:
+    branches: [master]
+  release:
+    types: [published]
+
+jobs:
+
+  build:
+    runs-on: ubuntu-20.04
+    permissions:
+      packages: write
+
+    steps:
+
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Prepare
+      id: prepare
+      run: |
+        DOCKER_IMAGE=ghcr.io/ssup2-playground/service-peccy-app
+        DOCKER_PLATFORMS=linux/amd64,linux/arm64
+        VERSION=""
+        if [[ $GITHUB_REF == refs/tags/* ]]; then
+          VERSION=${GITHUB_REF#refs/tags/v}
+          TAGS="--tag ${DOCKER_IMAGE}:${VERSION} --tag ${DOCKER_IMAGE}:latest"
+        else
+          VERSION=commit-${GITHUB_SHA::8}
+          TAGS="--tag ${DOCKER_IMAGE}:${VERSION} --tag ${DOCKER_IMAGE}:branch-${GITHUB_REF#refs/heads/}"
+        fi
+        echo ::set-output name=docker_image::${DOCKER_IMAGE}
+        echo ::set-output name=version::${VERSION}
+        echo ::set-output name=buildx_args::--platform ${DOCKER_PLATFORMS} \
+          --build-arg VERSION=${VERSION} \
+          --build-arg BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ') \
+          --build-arg VCS_REF=${GITHUB_SHA::8} \
+          ${TAGS} --file ./Dockerfile .
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v1
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v1 
+
+    - name: Build image
+      run: |
+        docker buildx build --output "type=image,push=false" ${{ steps.prepare.outputs.buildx_args }}
+     
+    - name: Login to Github Container Registry
+      if: success() && github.event_name != 'pull_request'
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GHCR_SECRET }}
+
+    - name: Push image
+      if: success() && github.event_name != 'pull_request'
+      run: |
+        docker buildx build --output "type=image,push=true" ${{ steps.prepare.outputs.buildx_args }}
+     
+    - name: Inspect image
+      if: always() && github.event_name != 'pull_request'
+      run: |
+        docker buildx imagetools inspect ${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }}