## Context
This PR removes pg_graphql from the setup. It also updates the local
setup documentation accordingly.
Note: We removed local setup scripts to align with redis installation,
the setup should be much simpler since we don't rely on pg_graphql
anymore.
## Test
tested locally with docker + mac (brew) setup
Having 2 different dev setups caused confusion, let's remove the Docker
local setup and recommend people install yarn locally.
Also simplified some docs by merging pages together, the recommend
self-hosting option is now the docker-compose / to adapt the
docker-compose.
