Add documentation of gzip_static configuration

[whatcould]

The attribute was added (aa68b47717b2b ) but it was not documented in the README. I had to dig for it.

I wonder if adding http_gzip_static_module should set node['nginx']['gzip_static'] = 'yes' by default? That seems like the principle of least surprise. It took me a while to figure out why my .gz files were not being served even though I had enabled the module.

[yveslaroche]

For better performance use this only in a location block.

https://github.com/h5bp/server-configs-nginx/blob/master/nginx.conf#L112-L115

This should be turned on if you are going to have pre-compressed copies (.gz) of
static files available. If not it should be left off as it will cause extra I/O
for the check. It is best if you enable this in a location{} block for
a specific directory, or on an individual server{} level.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.