Solved #79 Added : 404 error page

[sameersrivastava13]

Description

To add a 404 error page to keep a visitor on your site even if he/she hits a page that doesn't exist. Also to change the bad User experience to a positive one by adding some links to that 404 page so that the visitor can navigate to some other page.

Fixes #79

Type of Change:

Delete irrelevant options.

• Code
• Quality Assurance
• User Interface
• Documentation

Screenshots

Checklist:

• [x] My code follows the style guidelines(Clean Code) of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have added tests/screenshots(If any) that prove my fix is effective or that my feature works

[sameersrivastava13]

@Aakansha99 Please review.

[sameersrivastava13]

Hi @Aakansha99 can you please review the code.