How can I configure default directives for all servers in nginx? (Problems with Plesk)

I have a DV 4.0 server on media storage which is configured with nginx as a reverse proxy for apache. I want to set up some far future expiration headers (using blocks location

) and other settings for my (multiple) domains running through nginx.

Usually this is not a problem, just create a general set of rules and include

them in a block server {}

. However, Plesk automatically creates and updates blocks server {}

in separate files, which means that any changes made to these files are destroyed.

Ideally, I would like to create a generic block server {}

that will apply all servers as defaults, but if that doesn't exist, I would like to know how to add custom directives to Plesk so that they don't break off when it overwrites files.