[Readme] missing one command to host website locally

When we run website locally with mentioned instructions in readme file.it just build project only but does not deploy it on locally in browser.On terminal we need some other instruction also to run website locally on browser also.

With **npm run build** it just build the project but does not deploy it on browser locally.
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**This is what happens after installing all dependencies but it just build project not host it locally on browser**

Start with the README instructions around `npm run build` and verify what happens after that command. Identify the project’s missing local browser-serving step, then update the README so the complete build-and-host workflow is documented and can be followed successfully.

Written by the indexing model from the issue text.