solutions/.github/workflows/build-push-template.yml

name: Build and Push template

on:
  push:
    branches:
    - master

jobs:
  build-push-template:
    runs-on: ubuntu-18.04
    steps:
    - uses: actions/checkout@v2

    - name: Build and push the node-template Docker image
      uses: docker/build-push-action@v1 # https://github.com/docker/build-push-action
      with:
        username: ${{ secrets.DOCKER_USERNAME }}
        password: ${{ secrets.DOCKER_PASSWORD }}
        dockerfile: .devcontainer/Dockerfile
        repository: paritytech/substrate-playground-template-node-template
        tags: latest
        add_git_labels: true
        tag_with_ref: true
        tag_with_sha: true

    - run: echo ::set-output name=image::paritytech/substrate-playground-template-node-template:sha-${GITHUB_SHA::7}
      id: env

    - name: Update devcontainer.json
      run: |-
        t=$(mktemp)
        cat .devcontainer/devcontainer.json | jq ".image = \"${{ steps.env.outputs.image }}\"" > ${t} && mv ${t} .devcontainer/devcontainer.json

    - name: Commit .devcontainer.json update
      uses: EndBug/add-and-commit@v4
      with:
        message: ":bookmark: update image"
        add: ".devcontainer/devcontainer.json"
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

    - name: Trigger playground inclusion
      uses: peter-evans/repository-dispatch@v1
      with:
        token: ${{ secrets.REPO_ACCESS_TOKEN }}
        repository: paritytech/substrate-playground
        event-type: template-updated
        client-payload: '{"id": "node-template", "image": "${{ steps.env.outputs.image }}"}'