publish.yml

# Taken from https://docs.github.com/en/actions/publishing-packages/publishing-docker-images
name: Create and publish a Docker image

on:
  push:

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

jobs:
    build-and-push-image:
        runs-on: ubuntu-latest

        # Sets the permissions granted to the GITHUB_TOKEN for the actions in this job.
        permissions:
            contents: read
            packages: write

        steps:
            - name: "Checkout repository"
              uses: actions/checkout@v4

            - name: Log in to the Container registry
              uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
              with:
                registry: ${{ env.REGISTRY }}
                username: ${{ github.actor }}
                password: ${{ secrets.GITHUB_TOKEN }}

            - name: Extract metadata (tags, labels) for Docker
              id: meta
              uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
              with:
                images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

            - name: Build and push Docker image
              uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
              with:
                context: .
                push: true
                tags: ${{ steps.meta.outputs.tags }}
                labels: ${{ steps.meta.outputs.labels }}