feat: updated readme

insu-learn

## Hosted application

This project is hosted at https://xsieklov.pages.fi.muni.cz/insu-learn/.

Please note that, unfortunately, reloading pages in the browser or attempting to

navigate directly to a specific path, even if valid, will lead to a 404 error.

Please note that, unfortunately, GitLab Pages may not function optimally with BrowserRouter,

which the application uses for routing. Therefore, reloading pages in the browser or attempting

to navigate directly to a specific path, even if valid, will lead to a 404 error.

After encountering a 404 error, return to the root page and 

use the available navigation on the page to navigate to your desired location.

## Local application