Separate out logs for each server block on the nginx router

[madhurranjan]

We need to be able to have separate log files for access and error per server block in nginx. This is so that we can debug applications separately instead of looking at a generic log file . This is needed as we get more traffic and applications on Nginx.

Configuration that you might need in the template for each server:
server {
server_name
error_log /var/log/error_<deployment_name>.log error;
access_log /var/log/access<deployment_name>_.log router;
}
router and error here at the end of each lines represent the log format in nginx. I'll add another issue for the log format.

[mpnally]

Mamu, what is <deployment_name>? What do you think about:

error_log /var/log/nginx/error_<server_name>.log level;
access_log /var/log/nginx/access_<server_name>.log format;