Provide an engagement homepage for prospective content providers/publisher

[okbrown]

Summary

As a visitor, I want to submit my interest so that I can participate in the community

Acceptance Criteria

Scenario: User submits valid form values

Given that I am on the landing page
When I input valid content into all the required fields
And click ‘Submit’
Then the form is submitted
And a confirmation message is displayed
And a notification email is sent to the admin team

Scenario: User submits invalid form values

Given that I am on the landing page
When I input invalid content into a field
And click ‘Submit’
Then an error message is displayed
And the focus is returned to the first invalid field

Additional context

@MikeDre to confirm whether form will be displayed inline or in a modal