You need to be more specific with your questions. At first read: stackoverflow.com/help/how-to-ask
If you ask better questions, you will get answers.
As already mentioned, there are many react starters. If you stuck with one, try another. Esbuild and Vite are nice options too, besides NextJs and Gatsby ...
Or maybe you should use npm run dev instead of npm start ;)
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You need to be more specific with your questions. At first read: stackoverflow.com/help/how-to-ask
If you ask better questions, you will get answers.
As already mentioned, there are many react starters. If you stuck with one, try another. Esbuild and Vite are nice options too, besides NextJs and Gatsby ...
Or maybe you should use
npm run devinstead ofnpm start;)