Developing an app that depends on an app which doesn't have exports.sh

Hi, I’m making an app that depends on LNBits (a proxy that will allow to connect to your LNBits via Holesail).

In the umbral-apps repo, LNbits does not have an “exports.sh” file. It’s docker-compose.yml contains:

services:
  app_proxy:
    environment:
      APP_HOST: lnbits_web_1
      APP_PORT: 3007
      PROXY_AUTH_ADD: "false"

Suppose I’ll add lnbits to my umbral-app.yml’s dependencies. I want to define in my app’s docker-compose.yml the environment variables “LNBITS_TARGET_ADDRESS” and “LNBITS_TARGET_PORT” to point to the LNbits app.

Should I define them directly to “lnbits_web_1” and “3007”? Or will there already be environment variables that I could use, like: LNBITS_TARGET_ADDRESS: APP_LNBITS_IP, LNBITS_TARGET_PORT: APP_LNBITS_PORT?

Or should I add an exports.sh file to the lnbits dir? And if so, what should it contain?

Thanks!