Desing a 404 error page

[capedcrusader23]

Description
Some of the links are not working in website.Design a 404 error page for the website/

[luigimorel]

I am on it.

[nil1729]

404 Page is not added yet. Can I work on this issue again?

[vkassingh]

I want to work on this issue. Maintainers, please assign it to me.

[vkassingh]

@jaskiratsingh2000 I have developed the 404 error page, how can i add the error page to website?