nginxIncrease upstream buffers ("Upstream sent too big header" error)

proxy_buffer_size   64k;
proxy_buffers       16 64k;
fastcgi_buffer_size 64k;
fastcgi_buffers     16 64k;ctrl + cyoutubegithub

`proxy_buffer_size 64k` will increase proxy buffer size to 64k (from default 8k)	`proxy_buffers 16` we will have 16 buffers available (from default 8)
`fastcgi_buffers` the same as `proxy_buffers` but for PHP	`astcgi_buffer_size` the same as `proxy_buffer_size` but for PHP