Database cluster with read/write nodes

Hello,

first of all, thank you for this amazing project.

We currently have a postgres cluster with Master-Slave Replication
In order to use it properly, I would like to know if it's possible to have two kind of DATABASE_URL one for write operations and another one for read operations. It will allow us Master node only for reading.

If you need for details, don't hesitate.

Thanks in advance