You need to require /app/config/config.js from your module.
Also:
If you want to use environment variables you need to change core files and make sure you discard changes with GIT with every update.
lib/setup/redis.js
const config = require('./config');
if (config.redis) {
const redis = require('redis');
global.redisClient = redis.createClient(config.redis === true ? 'redis://redis' : process.env.REDIS_URL);
}
module.exports = global.redisClient;
This way I set redis to NO(unchecked) on the UI and load it from dotenv