github action - deploy master to heroku

heroku_deploy.yml

name: deployment

on: [push]
  pull_request:
    types: [closed]
    branches:
      - master

jobs:
  main:
    runs-on: ubuntu-latest
    if: github.event.pull_request.merged

    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          ref: master
      
      - name: Deploy to staging
        env:
          HEROKU_API_TOKEN: ${{ secrets.HEROKU_API_TOKEN }}
          HEROKU_APP_NAME: "project-tapir"
        if: github.ref == 'refs/heads/master' && job.status == 'success'
        run: |
          git filter-branch -- --all
          git push https://heroku:[email protected]/$HEROKU_APP_NAME.git $(git rev-parse --abbrev-ref HEAD):master -f