Client Side Validation in Sign Up form

[Pratik Chaudhary]

Is your feature request related to a problem? Please describe.
Set up client-side validation for the sign up form in issue number #8 .

Describe the solution you'd like
Client Side Validation-

1. Check if all the the fields are filled.
2. Show a red * mark on mandatory fields.
3. Password length of 8 or more than 8 .
   4.Validate email and phone number with regular expressions.
4. Do other necessary validations if you found any.

(no more variations)