This is two changes:
Replacing all usages of SimpleLogger with it's interface SimpleLogging which makes it easier to swap out loggers going forward
Nukes SimpleLogger in favor of StructuredLogger which allows us to better analyze logs in our log management system we choose.
- Use logger for all warnings. Previously we were writing warnings from
cmd/server.go directly to stderr which bypassed our normal log format.
- Add the timezone to log output. This is just really nice to have if
you're looking at old logs.
- Change levels to all be 4 characters: DBUG, INFO, WARN, EROR. This
makes the logs easier to read because it lines up.
- Log when we first receive the request as well as when we send a
response. This makes it easier to see where the request starts and ends.
