Controlling-Logging.md

+Some logging Hofund commands:
+
+  - `config logging enable component:LEVEL`
+  - `config logging disable component:LEVEL`
+  - `config logging reset`
+
+Components are hierarchical logger names in the style of Python logging. So for example, `Queues:INFO` refers to messages from the _Queues_ component of level _INFO_ or higher. You can specify more granular 
+logger levels by using for example `Routing.Outgoing:DEBUG` instead of the more general `Routing:DEBUG` 
+
+A note on `DEBUG` logs. By default these are disabled due to performance considerations. In order to actually get DEBUG level logs you need to compile the image with the Cabal `debug` flag turned on, so:
+
+```
+stack build --flag heimdoll:debug
+```