Fix Login with SteemConnect issue

Details

I have deployed the alpha code of Steemlinked on heroku and enabled CICD. The code is an older fork of busy beta app and we are developing our application on top of it. Steemlinked is a community platform for professionals and freelancers on Steem. I have found a bug on the deployed app. Here is the bug description -
Steemlinked is using Steemconnect v2 to enable Steem users to log in with their Steem credentials. When someone tries to log in using the log in button on the front page of the application, it redirects the user to the steemconeect login page to get the credentials and after successfully authentication it gives a 404 error instead of redirecting the user to the application home page.

Step to reproduce the error :

1. Open http://steemlinked.herokuapp.com
2. On the application home page, click log in button which redirects you to the steemconnect authentication page
3. Provide necessary permissions on the permissions page and click on continue button
4. On the authentication page, provide your steemconnect credentials and click on Log in
5. You should see an error response page with 404 code.
6. Check the callback URL, it is redirecting to localhost:3000

After logging in

Components

This bug is related to steemconnect log in feature of busy parent code. The problem lies in the redirect URL which is currently set to https://localhost:3000/authentication callback while in production it must redirect the user to https://steemlinked.herokuapp.com/authentication callback.

Deadline

Since this is a blocking bug, it needs to be resolved ASAP. The deadline for the same is 2 days from the time of posting this bug.

Communication

For more details about the bug and project, you can contact me here on busy.org, send me a message on https://steemit.chat/aneilpatel or join us on discord server https://discord.gg/AusUXtz.