Create a multi-arch Drone pipelines using Docker in Docker

.drone.yml

kind: pipeline
name: build-container-amd64

platform:
  os: linux
  arch: amd64


# Define the steps of the pipeline
steps:
  - name: build-amd64
    image: plugins/docker
    settings:
      username:
        from_secret: REGISTRY_USER
      password:
        from_secret: REGISTRY_PASSWORD
      registry:
        from_secret: REGISTRY
      repo: git.<snip>.fi/${DRONE_REPO_OWNER}/${DRONE_REPO_NAME}
      tags:
        - latest-amd64
      
---
kind: pipeline
name: build-container-arm64
type: docker

platform:
  os: linux
  arch: arm64


steps:
- name: build-arm64
  image: plugins/docker
  settings:
      username:
        from_secret: REGISTRY_USER
      password:
        from_secret: REGISTRY_PASSWORD
      registry:
        from_secret: REGISTRY
      repo: git.<snip>.fi/${DRONE_REPO_OWNER}/${DRONE_REPO_NAME}
      tags:
        - latest-arm64



---
kind: pipeline
name: docker-manifest

clone:
  disable: true

platform:
  os: linux
  arch: amd64


steps:
  - name: manifest
    image: plugins/manifest
    pull: always
    settings:
      password:
        from_secret: REGISTRY_PASSWORD
      username:
        from_secret: REGISTRY_USER
      target: git.<snip>.fi/${DRONE_REPO_OWNER}/${DRONE_REPO_NAME}:${DRONE_COMMIT_SHA}
      template: git.<snip>.fi/${DRONE_REPO_OWNER}/${DRONE_REPO_NAME}:latest-ARCH
      platforms:
        - linux/amd64
        - linux/arm64


depends_on:
  - build-container-arm64
  - build-container-amd64