Instrument the API with better error logging

[dpopp07]

In order to debug potential server errors (not that I would ever write buggy code), we should be utilizing the logger to print more verbose messages about errors caught in the API.

We probably want verbose logging statements:

• In the global error handling middleware
• In any errors we catch, to give more information about them (MAYBE)
• In any places that could provide useful info for debugging, like some variables that are relevant (MAYBE)