presentation/Improve feedback

[charlestietjen]

Convey accurate error messages to the user when a problem occurs.

• Sign up could use clear errors, prompt for a valid email when not valid, copy the same regex password validation and run it in the front as well so we can communicate if a password doesn't meet our conditions.
• Login errors should remain vague, only indicating that there is no username/password combination that matches the entered. Telling an end user that one is right and the other is not is a security risk.
• Check all inputs in the front for error responses when empty, we should consider looking into filtering for urls in posts also to cover soliciting.

[stevedusome]

we can consider using the transparent div with the about us as a display board to push any other instructions. once we fix the font readability of course. considering polishing the login page as my next thing