build-push-action/docs/advanced/copy-between-registries.md

# Copy images between registries

[Multi-platform images](https://docs.docker.com/build/building/multi-platform/)
built using Buildx can be copied from one registry to another using the
[`imagetools create` command](https://docs.docker.com/engine/reference/commandline/buildx_imagetools_create/):

```yaml
name: ci

on:
  push:
    branches:
      - 'main'

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - 
        name: Checkout
        uses: actions/checkout@v3
      -
        name: Set up QEMU
        uses: docker/setup-qemu-action@v2
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2
      -
        name: Login to Docker Hub
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      -
        name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      -
        name: Build and push
        uses: docker/build-push-action@v3
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: |
            user/app:latest
            user/app:1.0.0
      -
        name: Push image to GHCR
        run: |
          docker buildx imagetools create \
            --tag ghcr.io/user/app:latest \
            --tag ghcr.io/user/app:1.0.0 \
            user/app:latest
```