fix/refactor all

[SalwaMugh]

• [ ] make sure every error will appear to the user , for example : if an empty user name or wrong password and so on.
• [ ] make sure the front and the back connected properly .
• [ ] fix Footer and add it to the pages
• [ ] modify YOUR PRIVACY page style
• [ ] modify info page style
• [ ] modify contact page style
• [ ] modify login style
• [ ] modify sign up style
• [ ] style all the sweet alert
• [ ] also #152
• [ ] fix title margin