[Fix] Add React play api url in .env

[sudipkundu999]

Description

• When you want to change the API server to work on a different one than https://api.github.com/repos/reactplay
  we need to make changes in the FW code and modify 4 files.
• After this, we just need to change the env variable to change the server URL without changing the main application code. If reactplay needs to change the API's URL later, no need to modify the code too.

Fixes #1133

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Changed the environmental variable to some random string and got 404. Entering the correct URL works.

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

[vercel]

@sudipkundu999 is attempting to deploy a commit to a Personal Account owned by @reactplay on Vercel.

@reactplay first needs to authorize it.

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[sudipkundu999]

Ready for review.

• Please add REACT_APP_PLAY_API_URL='https://api.github.com/repos/reactplay' as env variable before deploying.

[priyankarpal]

Looks Good 🎉

[joshi-kaushal]

LGTM 🚀

[priyankarpal]

Ready for review.

• Please add REACT_APP_PLAY_API_URL='https://api.github.com/repos/reactplay' as env variable before deploying.

@joshi-kaushal please add it if you have access

[joshi-kaushal]

Ready for review.

• Please add REACT_APP_PLAY_API_URL='https://api.github.com/repos/reactplay' as env variable before deploying.

@joshi-kaushal please add it if you have access

No, I don't have access to it...

[atapas]

@sudipkundu999 Please take care of this.