publish.yml

# This is a basic workflow to help you get started with Actions

name: Publish

# Controls when the workflow will run
on:
  # Triggers the workflow on push or pull request events but only for the trunk branch
  push:
    tags:
      - v*

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    # if: ${{ startsWith(github.ref, 'refs/tags/v') }} # only if version tag
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
     -  uses: actions/checkout@v2
     #Install Node.js, with the version 12 and using the registry URL of npm, this could be changed to a custom registry or the GitHub registry.
     -  uses: actions/setup-node@v2
        with:
         node-version: 12
         registry-url: https://registry.npmjs.org/
         
      # npm install
     -  run: npm install
     
     -  name: Authenticate with Registry
        run: |
          echo "registry=https://registry.npmjs.org/" >> .npmrc
          echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" >> .npmrc
          npm whoami
        env:
          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
     
     # run build
     - run: npm run build
     
     # Publish to npm
     -  run: npx lerna publish from-package --no-verify-access --yes
        env:
         NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}