This project is for building a Docker image that runs an IOTA Hub.
https://docs.iota.org/docs/hub/0.1/introduction/overview
The Hub connects to an IOTA node's API port and exposes a port for gRPC API for payment processing.
Production deployments that use MariaDB replication may run into the following problem: http://wiki.ispirer.com/sqlways/troubleshooting-guide/mysql/import/binary-logging
For those on Amazon RDS this can be resolved by defining a parameter group as shown here: https://aws.amazon.com/premiumsupport/knowledge-center/rds-mysql-functions/