Nginx fixes in config

Submitted by Dmitro on

To detect if there are any errors:

nginx -T

To fix 504 Timeout error: 

upstream timed out: fastcgi_read_timeout 600s;

To fix error "upstream sent too big header while reading response header from upstream" need to append the following directives:

fastcgi_buffers 16 32k;
fastcgi_buffer_size 64k;
fastcgi_busy_buffers_size 64k;
#fastcgi_buffering off;
large_client_header_buffers 4 8k;