docker-compose_ksql-server_1 and docker-compose_datagen-ratings_1 exiting while running docker

So when i try to run this example, **examples/postgres-debezium-ksql-elasticsearch**
the KSQL and datagen containers are exiting with the following logs
```

[kafka-admin-client-thread | adminclient-1] WARN org.apache.kafka.clients.NetworkClient - [AdminClient clientId=adminclient-1] Connection to node -1 (kafka/172.20.0.4:29092) could not be established. Broker may not be available.
[kafka-admin-client-thread | adminclient-1] WARN org.apache.kafka.clients.NetworkClient - [AdminClient clientId=adminclient-1] Connection to node -1 (kafka/172.20.0.4:29092) could not be established. Broker may not be available.
[kafka-admin-client-thread | adminclient-1] WARN org.apache.kafka.clients.NetworkClient - [AdminClient clientId=adminclient-1] Connection to node -1 (kafka/172.20.0.4:29092) could not be established. Broker may not be available.
Waiting for Confluent Schema Registry to be ready...
Unexpected response with code: 407 and content
```
Now im behind a proxy which i have correctly setup in docker but looks like the container is trying to hit the following URL http://schema-registry:8081/config and getting refused.
Following hosts are bypassed from proxy server -> localhost,127.*.*.*,172.*.*.*,schema-registry
Is there any specific connection settings that i need to be aware of ? or proxy bypass settings?