Setup Ruby On Rails on Laptop

Today, I installed Ruby on Rails on my Dell laptop running on Ubuntu Linux 16.04 (32-bit/i386). I just following the instructions on GoRails (https://gorails.com/setup/ubuntu/16.04) and everything seemed going smoothly. I also generated a new RSA SSH key in my laptop for Github account. So, my Github account has 2 public keys one. One key is for my desktop and another one is for my laptop computer. For my laptop, I just use the default Sqlite database and I did NOT install MySQL for my laptop. Because I think that I won't host the Ruby on Rails server and the database in a laptop computer.

Update: I have to install PostgreSQL database for Heroku production environment. Please see my next article. 

References:
Setup Ruby On Rails on Ubuntu 16.04 Xenial Xerus
https://gorails.com/setup/ubuntu/16.04