If you want to use kafka, ensure that kafka is ready to use. (you should set the external kafka server address in compose file 'KAFKA_CFG_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,EXTERNAL://<host_addr>:9094'. host_addr is the host address of the kafka server) . if you do not use kafka from outside and only use it betwwen containers, you can use only 'KAFKA_CFG_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092' in compose file, no need to use EXTERNAL.

If you want to use mongodb, ensure that mongodb is ready to use and set the mongodb credentials in compose file. and set MONGO_URI in .env file with the credentials. set also MONGO_DB_NAME in .env file with the database name.