bridge (pb): connection can be set to used either UNIX socket or TCP socket: all settings are to be put in `[DEFAULT]` section - `bridge_pb_connection_type` can be set to `unix_socket` or `socket` - for `socket`, `bridge_pb_host` and `bridge_pb_port` can be specified

version: "3.6"
services:

  sat:
    image: salutatoi/sat
    build: backend

  libervia:
    image: salutatoi/libervia
    build: libervia
    depends_on:
      - sat