Create index.mdx

[goldfarbas]

Attention (CC)

@twblack88 @MaximumCrash

Summary of changes

Adds a landing page detailing the rules of Richard's art contest to the Contribute section. This is being proposed by Richard as a landing page for the contest.

Relevant Context

• Feature: [ticket number](link to project management ticket)
• Relevant Pull Request: #

How Has This Been Tested?

Screenshots (if appropriate):

Further comments

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Types of changes

• Content edit, File upload, content addition
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Technical Documentation Update
• Other (please describe):

Does this introduce a breaking change?

Breaking change is defined as "A fix or feature that would cause existing functionality to change."

• Yes
• No

Checklist:

• My code follows the code style of this project.
• I have added tests that prove my fix is effective or that my feature works
• I have added/changed necessary documentation (if appropriate)
• All new and existing tests passed.

[twblack88]

This repo is now in just good ole makerdao/community! should be pretty easy to commit over there. Lemme know if you hit any snags though!!!