docker-build.yml

name: Docker Image CI

on:
  push:
    branches: [main]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout the repo
        uses: actions/checkout@v2
      - name: Prepare
        id: prep
        run: |
          REPOSITORY=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]')
          DOCKER_IMAGE=ghcr.io/${REPOSITORY}
          VERSION=latest
          TAGS="${DOCKER_IMAGE}:${VERSION}"
          echo ::set-output name=version::${VERSION}
          echo ::set-output name=tags::${TAGS}
          echo ::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push
        uses: docker/build-push-action@v2
        with:
          context: .
          pull: true
          push: true
          cache-from: type=registry,ref=${{ steps.prep.outputs.tags }}
          cache-to: type=inline
          tags: ${{ steps.prep.outputs.tags }}