build.yml

# build.yml
name: Build & Push Docker Image to GHCR

on:
  # push: # Triggers the workflow on push events
  #   branches:
  #     - main
  workflow_dispatch: # Allows manual triggering of the workflow from the GitHub Actions tab

env:
  DOCKERFILE_PATH: ./server/Dockerfile   # 👈 Update this to wherever your Dockerfile is within your repository

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

    steps:
      - name: Checkout Repository 👀
        uses: actions/checkout@v4     # Clones the repo for the workflow to access

      - name: Set up QEMU for cross-platform builds
        uses: docker/setup-qemu-action@v3

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

      - name: Login to GitHub Container Registry 🔐
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GHCR_PAT }}

      - name: Convert owner and repo to lowercase
        id: vars
        run: |
          echo "repo_owner=$(echo '${{ github.repository_owner }}' | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
          echo "repo_name=$(echo '${{ github.event.repository.name }}' | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"

      # Builds and pushes the Docker image to GitHub Container Registry
      # Uses the latest tag and the commit SHA as a version tag
      - name: Build and Push Multi-Arch Image 🐋
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ${{ env.DOCKERFILE_PATH }}
          platforms: linux/amd64,linux/arm64
          push: true
          tags: |
            ghcr.io/${{ steps.vars.outputs.repo_owner }}/${{ steps.vars.outputs.repo_name }}:latest
            ghcr.io/${{ steps.vars.outputs.repo_owner }}/${{ steps.vars.outputs.repo_name }}:${{ github.sha }}