Add more detailed steps when setting up the Firebase Emulator

[umangutkarsh]

Is your feature request related to a problem? Please describe.
Some more steps need to be added in the CONTRIBUTING.md file.

Describe the solution you'd like

1. Go to CONTRIBUTING.md/firebase-emulator.
2. Add more detailed steps

[github-actions]

Hello 👋🏻 @umangutkarsh! Thankyou for creating an issue!

[umangutkarsh]

@shivareddy6 , I've created the PR. Please review it and let me know if anything else is required. The CONTRIBUTING.md is updated according to the errors I faced while setting up the dev environment.
Thanks.

[shivareddy6]

@umangutkarsh, can you mention this issue in your pr. Only prs with valid issues are considered so its easy to get attention if this is mentioned your pr.

[github-actions]

This issue is stale because it has been open for 30 days with no activity.

[umangutkarsh]

@shivareddy6 . Please respond.
Thanks

[umangutkarsh]

@shivareddy6 . Please take out your time and review the pr. It would be helpful. Thanks.

[github-actions]

This issue is stale because it has been open for 30 days with no activity.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.