[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**