Create signup.html

[phatwillis]

Sign-up Page and #360

Title : Sign-up Page

Issue No. : #360

Code Stack : html, css an js

Close #<360>

Checklist:

• [/X] I have mentioned the issue number in my Pull Request.
• [/X] I have commented my code, particularly in hard-to-understand areas
• [] I have created a helpful and easy to understand README.md
• [/X] I have updated the Index.html file for my contribution

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[phatwillis]

done