Expose port 80 in Dockerfile.

Status check needs it to figure out what to monitor.
Merge pull request #194 from astopy/master

Expose port 80 in Dockerfile.
add exception tracking with airbrake

closes #177
Merge pull request #196 from camallen/exception_notifier

add exception tracking with airbrake
closes #197 bump staging log level

get more information in the staging logs for development
Merge pull request #198 from camallen/staging_logs

bump staging log level