The simple goal is for this app is to allow users to export customised and stylised topographic contour maps by selecting a square on the map. That's it. You can try for yourself on here
Most people will probably need only the production build which can be access through https://topographic-contour-maps.netlify.app
If you are familiar with React and Next.js already you should be able to run this project without any hassle.
npm run dev
# or
yarn dev
Open http://localhost:3000 with your browser to see the result.