[$40] Add Sign Up link

[jmgasper]

We've added a Sign Up link for users who are not logged in, which should redirect to the Auth0 sign up page:

https://marvelapp.com/prototype/64hibf3/screen/79554857

Standards

https://platform.topcoder-dev.com/model/help/copilots-link

[jmgasper]

Challenge https://www.topcoder.com/challenges/a3f23974-1b2e-4c79-9e7e-edf2e63c4011 has been created for this ticket.

This is an automated message for ghostar via Topcoder X

[jmgasper]

Challenge https://www.topcoder.com/challenges/a3f23974-1b2e-4c79-9e7e-edf2e63c4011 has been assigned to obog.

This is an automated message for ghostar via Topcoder X

[atelomycterus]

@jmgasper Please apply PRs:
topcoder-platform/forums-theme#58
topcoder-platform/forums-plugins#103
#626

Thanks!

Testing

[jmgasper]

Payment task has been updated: https://www.topcoder.com/challenges/a3f23974-1b2e-4c79-9e7e-edf2e63c4011
Payments Complete
Winner: obog
Copilot: ghostar
Challenge a3f23974-1b2e-4c79-9e7e-edf2e63c4011 has been paid and closed.

This is an automated message for ghostar via Topcoder X

[sdgun]

Verified in Dev, this link is taking the user to https://www.topcoder-dev.com/user-selection/