I want to start a online storage provider.
On this site, people can:
 - register
 - login 
 - see information about their storage quota
 - order storage (after logging in) using a slider. Price calculation must be available in config, price per gb and such. 
It must be built with:
 - aiohttp, jinja
 - vanilla js, vanilla css
Important:
 - it must be a python package professionally structured
 - it must use the aiohttp class based views
 - it must host it's own frontend
 - it hosts the root entry point 
 - javascript elements hould all extend from HTMLElement without shadowdom or shadowroot so they use the global css
 - javascript files must be in the ecmascript module way
 - structured css (css file per component)
 - templates must be structured very well 
 - commercial business look and feel
 - all user information and configuration and such are in json file as backend. It should provide nice backend services mutating those files. 
 - no database in exception of a very well structured json files
 - use as many files possible