Add restart option and postgrest max row environment

[harrier999]

To resolve a few issues that arose while operating the node, added several options to the docker-compose file.

1. Add option restart: unless-stopped to

   1. aggregator
   2. postgrest
   3. ws
   4. processor

2. Add enviroment value PGRST_DB_MAX_ROWS:500 to postgrest

[CRBl69]

Hi. Thank you for the PR. I think the restart flag is a good idea 👍

As for PGRST_DB_MAX_ROWS, you about putting this into an env variable called POSTGREST_MAX_ROWS ? This could then be set in the .env file, along side other env variables.

[alnoki]

@harrier999 thank you for your contribution!

I've requested two minor changes that should make for an easier UX

[harrier999]

Thank you for your feedback, everyone!
I have incorporated your feedback. Could you please review it?

[alnoki]

@harrier999 thank you for your contribution and for a prompt resolution to review comments!