Working on Ubuntu 18.04 LTS and Win 10
Create SSH key in your machine:
$ ssh-keygen -t rsa -b 4096 -C "my@email.com"
Check if "id_rsa" and "id_rsa.pub" were created:
$ ls -al ~/.ssh
id_rsa.pub is public and it's shared with github and heroku to secure the connection between your machine connection and the servers.
Check if "ssh-agent" is up and running:
$ eval "$(ssh-agent -s)"
Now register the file, then when we connect with SHH, this file will be used. To register, run:
$ ssh-add ~/.ssh/id_rsa
We get the public key value, and you must to copy to the clipboard:
$ cat ~/.ssh/id_rsa.pub
Then, go to GitHub's setting -> SSH Keys -> New SSH key, and paste the public key, then save.
Check the connection:
$ ssh -v git@github.com
Set the Heroku public key:
$ heroku keys:add
Create a new Heroku project, the name must be unique:
$ heroku create unique-names-application
This create a remote branch, then when yopu run "git remote", origin and heroku branches must be appear. In "package.json" you must specify the script that initialice the app: "start":"node file-route.js" Define ports environment variable, Heroku will give a port -> const port = process.env.PORT || 3000
Push to Heroku:
$ git push heroku master