build-container.yaml

name: "Build Django image"

concurrency:
  group: ${{ github.ref }}
  cancel-in-progress: true

on:
  push:
    branches:
      - "main"
  pull_request:
    branches:
      - "main"
  workflow_dispatch:

permissions:
  contents: read
  packages: write

jobs:
  build-push:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

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

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ github.token }}

      - name: Set REGISTRY env variable
        run: echo "REGISTRY=ghcr.io/$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV

      - name: Build container image
        uses: docker/build-push-action@v4
        id: build-image
        with:
          context: ./.
          file: ./Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{env.REGISTRY}}:${{github.run_number}}, ${{env.REGISTRY}}:latest
          cache-from: type=gha
          cache-to: type=gha,mode=max