In the project directory, you can run:
Runs the app in the development mode.
Open http://localhost:8080 to view it in the browser.
The page will reload if you make edits.
To learn React, check out the React documentation.
On real project I do not use Bootstrap for create components. I prefer to create own React components and reuse them. If we use Bootstrap components we need to download a lot of additional libraries(jquery, popper) or use React-bootstrap or Reactstrap. As result we load the system. Also we need to research new syntax that will influence on speed develop.
At current project I use default data( countries code, countries) you can rewrite it use (ex.axios)
Thanks a lot that you give me chance to participate in develop your application