Add migration tool and update readme file

Add mail service and configuration

Refactor api package to resources

Move basemodel to a new pakage to prepare for aerich migration

Add api_url to env.example.txt file

Fix role schema disparity with role model

Attach roles router to app

Add roles router

Add role schema

Add Role model and add relationship to users table

Add db config file and refactor main and db files

Clean up code

Add source files

Add user authentication

Add configuration files