build_docker_image.yaml

name: Create and publish a Docker image

on:
  push:
    branches:
      - "main"
      - "pulumi"
    tags:
      - "*"

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-and-push-image:
    name: Push Docker images to GitHub container repository
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - dockerfile: docker/reginald/Dockerfile
            image: ghcr.io/${{ github.repository }}_reginald
          - dockerfile: docker/slack_bot/Dockerfile
            image: ghcr.io/${{ github.repository }}_slackbot
    permissions:
      packages: write
      contents: read

    steps:
      - name: Check out the repo
        uses: actions/checkout@v3

      - name: Log in to the Container registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ matrix.image }}

      - name: Build and push Docker images
        uses: docker/build-push-action@v4
        with:
          file: ${{ matrix.dockerfile }}
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}