nginx in docker container should log to stdout and not to files

[lordfolken]

These logs land in the container.

Nginx should log to stdout/stderr and should let the container host handle the logs.

mapgen/container/frontend/files/default

Lines 8 to 9 in 67df25e

	access_log /var/log/nginx/mapgen-frontend_access.log;
	error_log /var/log/nginx/mapgen-frontend_error.log;