Fixed error upstream sent too big header while reading response header from upstream
diff --git a/nginx/files/proxy.conf b/nginx/files/proxy.conf
index c697f05..fca6c1e 100644
--- a/nginx/files/proxy.conf
+++ b/nginx/files/proxy.conf
@@ -56,6 +56,10 @@
       proxy_redirect off;
       {%- endif %}
 
+      proxy_buffer_size   128k;
+      proxy_buffers   4 256k;
+      proxy_busy_buffers_size   256k;
+
       {%- if site.proxy.buffer is defined %}
       {%- set buffer_size = site.proxy.buffer.get('size', 16) * 2 %}
       proxy_buffering on;