This commit enhances the user experience in two ways:
1. The feedback messages within the setup1.html file have been updated for both the username and password fields. The new messages better inform users about the rules for valid input— stating that the username must be 3-20 characters long and the password must contain at least eight characters.
2. The password validation process has been adjusted. Now, only the confirm password field gets marked as invalid when the entered passwords don't match. This helps users understand exactly which field needs correction.
Florian Sylvain