This project was bootstrapped with Create React App.
It is PWA so in order to take advantage of this you need to run build command. For more information about this check below.
In the project directory, you can run:
Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.
Launches the test runner in the interactive watch mode.
Launches the test runner and generate coverage reports.
Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.
In order to test offline usage you need to serve this build folder with a static server.
For do this you can add serve globally with this command.
and after build process is finished you can serve recently created build folder with this command.