Postgrest & Postgraphile servers for Postgresql blockchain index

[aaronc]

This is a devops task primarily and would involve configuring a Postgrest and Postgraphile instance in module.nix for the Postgresql blockchain index. These should be enabled whenever the index is enabled and only deal with authenticating a public, read-only user - because the whole index is available for anyone to query and is read-only. Should be pretty straightforward, no need to deal with any of the JWT authentication stuff for these services.

Also worth considering an integration of something like https://github.com/go-spatial/tegola or https://github.com/urbica/martin for generation of Mapbox Vector Tile from Postgis, or tracking that for later

[clevinson]

@aaronc should this get closed ?

[aaronc]

It actually is still relevant.