build_and_publish.yml

name: Build and publish docker image

on:
  push:
    branches:
      - master

jobs:
  deploy:
    name: Build and publish docker image
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

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

      - name: Extract version from package.json
        id: extract_version
        run: |
          version=$(jq -r '.version' package.json)
          echo "PACKAGE_VERSION=$version" >> $GITHUB_ENV
    
      - name: Check if version already exists
        id: check_version
        run: |
          VERSION=${{ env.PACKAGE_VERSION }}
          IMAGE_NAME=ghcr.io/${{ github.repository_owner }}/my-image
          if docker manifest inspect $IMAGE_NAME:$VERSION > /dev/null 2>&1; then
            echo "Version $VERSION already exists."
            exit 1
          fi
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          tags: |
            ghcr.io/${{ github.repository_owner }}/documentation:latest
            ghcr.io/${{ github.repository_owner }}/documentation:${{ env.PACKAGE_VERSION }}