Variable naming

[NouraldinS]

I just now at the end of my review noticed this thing

posts-project/src/database/db.sql

Lines 12 to 17 in 543acb9

	create table posts (
	postId serial primary key,
	userId integer references users(userId),
	post text not null,
	postType boolean not null
	);

in your db.sql file, you've got a boolean property postType, which as far as I know, represents the privacy of a post. But why didn't you just name it public? In context, if it is true, then it is public, and otherwise it would be non-public (private)...

But since I'm already here, there's the first thing I noticed in your project, which is your start script, there's no meaning for having NODE_ENV=pro, because pro abbreviates (professional) not (production -intended-).