Convert this starter to a Gatsby theme

[rshackleton]

Motivation

The motivation is primarily to ensure the project is kept in line with the direction Gatsby is taking and to solve the drawbacks outlined in their documentation:

https://www.gatsbyjs.org/docs/themes/what-are-gatsby-themes/#gatsby-starters

Proposed solution

The proposed solution is to convert to a theme, the documentation can be found here:

https://www.gatsbyjs.org/docs/themes/converting-a-starter/

[fosteman]

It seems quite rational, though how to approach it ?

[rshackleton]

Probably worth doing alongside the (presumably) incoming rebranding to Kontent.