Fix #212 🐛 [Bug report]: XML Sitemap is not linked in robots.txt file and other SEO issues

[Sachin-chaurasiya]

First thing, PLEASE READ THIS: ReactPlay Code Review Checklist

Description

I worked on adding the XML sitemap file and its reference to the robots.txt file. fixed minor SEO issues too.

Fixes #212

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

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Name	Status	Preview	Updated
react-play	✅ Ready (Inspect)	Visit Preview	May 23, 2022 at 4:00PM (UTC)

[Sachin-chaurasiya]

Review Ready

[erayalkis]

LGTM! 🚀 Thank you for your contribution!

[atapas]

@all-contributors please add @Sachin-chaurasiya for Code

[allcontributors]

@atapas

I've put up a pull request to add @Sachin-chaurasiya! 🎉