How to deploy a mini nodejs application to Heroku

Youtube: https://www.youtube.com/watch?v=mq1vGG-O7tk

• run docker image (in my case nodejs:1)
• go to your folder (in our case /home/project because we mounted here our volume)
• create/copy index.js and public folder
• set same port than what you exposed in docker container
• npm init and install required module (ex. express)
• install git and put node_modules to ignore
• change port and package.json
  • port must use envPort for heroku
  • package.json - scripts must have "start": "node index"

• create heroku account (in my case it is a free account)
• create new app
• install & set heroku-cli
• use git to deploy
• from browser or open browser with terminal :D