Context:
Currently, the management port can only be set via management.server.port in the application.properties. We should add a config setting to allow users to easily adjust the port.

AT:

• actuator port is configurable via config setting
• new config setting is documented

Testing Notes:

• Set the actuator port with the env var: ** MANAGEMENT_SERVER_PORT
• Get the management report endpoints via a custom set port above
• Set the actuator port with the service-config file: container.ports.actuator
• Get the management report endpoints via a custom set port above