Drupal 8 Decoupled App

I am making a Drupal 8 fully decoupled app with React as front end.
I need a way to confirm user email addresses after registration. 
The email sent by drupal points to the domain of drupal backend.
I need the link with the Front end’s (React) domain name.

Is there a way I can alter it to achieve the desired result.

Thanks

Drupal version: 


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