docs: copy between registries with buildx

Signed-off-by: CrazyMax <[email protected]>

docs/advanced/copy-between-registries.md

@@ -1,10 +1,8 @@
 # Copy images between registries
 
-Multi-platform images built using buildx can be copied from one registry to another without
-changing the image SHA using the [tag-push-action](https://github.com/akhilerm/tag-push-action).
-
-The following workflow will first push the image to dockerhub, run some tests using the images
-and then push to quay and ghcr
+[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
@@ -27,26 +25,19 @@ jobs:
  -
  name: Set up Docker Buildx
  uses: docker/setup-buildx-action@v2
- - # quay and ghcr logins for pushing image after testing
- name: Login to Quay Registry
+ -
+ name: Login to Docker Hub
  uses: docker/login-action@v2
  with:
- registry: quay.io
- username: ${{ secrets.QUAY_USERNAME }}
- password: ${{ secrets.QUAY_TOKEN }}
+ 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: Login to DockerHub
- uses: docker/login-action@v2
- with:
- username: ${{ secrets.DOCKERHUB_USERNAME }}
- password: ${{ secrets.DOCKERHUB_TOKEN }}
  -
  name: Build and push
  uses: docker/build-push-action@v3
@@ -57,17 +48,11 @@ jobs:
  tags: |
  user/app:latest
  user/app:1.0.0
- - # run tests using image from docker hub
- name: Run Tests
- run: make tests
- - # copy multiplatform image from dockerhub to quay and ghcr
- name: Push Image to multiple registries
- uses: akhilerm/[email protected]
- with:
- src: docker.io/user/app:1.0.0
- dst: |
- quay.io/user/app:latest
- quay.io/user/app:1.0.0
- ghcr.io/user/app:latest
- ghcr.io/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
 ```