publish-dockerfile.yml

name: Create and publish a Docker image for the backend
on:
    push:
        branches: ["main"]

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

jobs:
    build-and-push-backend:
        runs-on: ubuntu-latest
        permissions:
            contents: read
            packages: write
            attestations: write
            id-token: write
        steps:
            - name: Checkout repository
              uses: actions/checkout@v4
            - name: Log in to the Container registry
              uses: docker/login-action@3b8fed7e4b60203b2aa0ecc6c6d6d91d12c06760
              with:
                  registry: ${{ env.REGISTRY }}
                  username: ${{ github.actor }}
                  password: ${{ secrets.GITHUB_TOKEN }}
            - name: Extract metadata (tags, labels) for Docker
              id: meta
              uses: docker/metadata-action@70b2cdc6480c1a8b86edf1777157f8f437de2166
              with:
                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
            - name: Build and push Docker image
              id: push
              uses: docker/build-push-action@e44afff3590e1d4f93b6adc72376512edb012a7c
              with:
                  push: true
                  tags: ${{ steps.meta.outputs.tags }}
                  labels: ${{ steps.meta.outputs.labels }}
            - name: Generate artifact attestation
              uses: actions/attest-build-provenance@v1
              with:
                  subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
                  subject-digest: ${{ steps.push.outputs.digest }}
                  push-to-registry: true