[Readme] missing one command to host website locally

[Mayank4git]

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

[Mayank4git]

@championswimmer please review it :) is there bounty point for this issue.?