Dedicated landing page

[steve-chavez]

Problem

Since the move to subpages inside API, seems our OOTB CRUD endpoints on tables/views are no longer visible: PostgREST/postgrest#2797

Solution

Add a dedicated landing page instead of using the docs as landing page. Here we can showcase all the features, with code snippets. Examples:

• https://dhall-lang.org/
• https://orgmode.org/

[steve-chavez]

Seems it's possible with just sphinx:

• https://github.com/ofosos/sphinx-landing-template
• https://ofosos.org/2018/12/28/landing-page-template/