docker-image.yml

name: Docker Image CD

on:
  push:
    tags:
      - '*.*.*'
    branches: [ "main" ]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:

      - name: Check out the repo
        uses: actions/checkout@v3
      
      - name: Login to Docker Hub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v4
        with:
          # set latest tag for main branch
          tags: |
            type=raw,value=latest
            type=ref,event=tag
          images: ${{ secrets.DOCKER_HUB_USERNAME }}/${{ github.event.repository.name }}

      - name: Build and push Docker image
        id:   docker_build
        uses: docker/build-push-action@v2
        with:
          context: .
          push: true
          # push main -> tag:latest, release x.x.x main -> tag:latest AND tag:x.x.x
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}