build.yml

name: Create Docker image
on:
  push:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-20.04
    if: "!contains(github.event.head_commit.message, 'ci skip:')" # If the commit contains "ci skip" this action won't run
    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Docker meta
        id: docker_meta
        uses: crazy-max/ghaction-docker-meta@v4
        with:
          images: ghcr.io/${{ github.repository }}
          tag-sha: true
          tag-custom: |
            latest

      - 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.CR_PAT }}

      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: Build and Push Docker Image
        uses: docker/build-push-action@v2
        with:
          build-args: |
            sha=${{ github.sha }}
          push: true
          tags: ${{ steps.docker_meta.outputs.tags }}
          labels: ${{ steps.docker_meta.outputs.labels }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache