name: Build and push Docker image
on:
  workflow_dispatch:
  pull_request:
    branches:
      - main
    types:
      - closed

jobs:
  build-and-push:
    if: github.event.pull_request.merged == true
    runs-on: ubuntu-latest
    steps:
      - name: Getting the codebase
        uses: actions/checkout@v4
        with:
          ref: main

      - name: Login to DockerHub
        uses: docker/login-action@v3
        with:
          username: ${{ vars.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Push to hub
        uses: docker/build-push-action@v6
        with:
          push: true
          tags: ${{ vars.DOCKERHUB_USERNAME }}/django-example-app:latest