Add feature flag support

[Neha]

Is your feature request related to a problem? Please describe.
As of now, we don't have feature flag support in this project. Feature flag will help in releasing the features with better developer control and testing too.

Describe the solution you'd like
Implement a feature flag solution. Either we can use a out-of-the-box solution like LaunchDarkly or create a simple our own feature flag solution (open for discussion).

Describe alternatives you've considered
NA

Additional context
NA

[Neha]

Move this to the discussions: #37