Fix logging

[AdamVig]

As a Stockpile developer, I want to store logs of every request for the past week of activity so I can diagnose problems when they are reported.

• [x] enable log rotation
• [x] enable log deletion
• [x] create a logs directory or log to /var/www instead of the API directory
• [x] send a less verbose logging stream to PaperTrail and stdout (don't include request/response bodies)