Just remembered that you can make use of Cloud flare’s Page Rules feature to handle URL forwarding from the domain your managing to another domain hosted else where on the internet. I think you also need to setup a CNAME record to make this work:
I needed http://twisum.adhir.co.za to redirect to https://young-mesa-51990.herokuapp.com .
this simply allows me during dev to work with friendly urls without signing up for a paid plan on heroku to add custom domains. You only receive 3 free Page Rules with the free Cloud flare account though.
Adhir Ramjiawan 