Microsoft Teams is a Microsoft collaboration tool and gained more popularity during COVID-19, becoming Microsoft's fastest-growing business app ever. But beyond the capabilities of collaboration and meetings, it comes with a rich library of extension apps which you can add to your teams.

If we want to have different settings based on the environment (development, test, production) we can leverage environment variables. However, if we bootstrapped our React application using "Create-react-app" command, we don't have access to the Webpack for the fully customised build. Instead, we can define variables in our NPM scripts and in our code we can test those variables and implement different functionalities.