Invalid Follow Challenge URL

[r-bartlett-gsa]

Follow Challenge URL gets appended to challenge.gov, making it invalid.

For example, this challenge: https://www.challenge.gov/?challenge=ghp-paths-prize
Follow URL should be this: https:/public.govdelivery.com/accounts/USGSATTS/subscriber/new/?topic_id=USGSATTS_CHAL-1853/
But clicking on Follow button loads this: https://www.challenge.gov/https:/public.govdelivery.com/accounts/USGSATTS/subscriber/new/?topic_id=USGSATTS_CHAL-1853/

Acceptance criteria:

• Clicking on Follow button loads correct URL

[jairoanaya]

@r-bartlett-gsa this issue has been resolved successfully. Please review.

[r-bartlett-gsa]

@r-bartlett-gsa this issue has been resolved successfully. Please review.

@jairoanaya Thank you!!