[Layout] Add ways to contribute to the "Contribute" page

[DAHuerta]

Description
The layout should include a text block -Center aligned
Heading at the top, text at the bottom

The second block of content underneath the first.
In the block, there should be 3 information button modules aligned horizontally, 1 for join as a developer, 1 for join as a designer, and 1 for just joining us.

Under the button, modules will be a block of text.

Mockup

Screenshot