Meltano

I want to get the docker-compose solution running using postgres as the default Meltano system database. After doing some reading it seems that
```a. `MELTANO_BACKEND=sqlite|postgresql` environment variable, or using the (-B|--backend) switch at invocation.

b. configure postgres host to point to `warehouse_db` as defined in docker-compose.yml```
Has anyone been able to get such an environm,ent working ?

This seems outdated, can you tell me where you found that?

Up to date documentation here <https://www.meltano.com/docs/environment-variables.html#system-database>

You can set that in a `.env` file in your project's root.