using same configuration as in...

using same configuration as in https://www.digitalocean.com/community/tutorials/understanding-nginx-http-proxying-load-balancing-buffering-and-caching

roles/nginx/templates/config/conf.d/proxy.conf

@@ -4,9 +4,9 @@
 # proxy_buffer_size too small can have bad interactions with the proxy
 # cache (the entire response headers should fit in the proxy_buffer).
 proxy_buffering on;
-proxy_buffer_size 16k;
 proxy_buffers 24 4k;
-proxy_busy_buffers_size 32k;
+proxy_buffer_size 1k;
+proxy_busy_buffers_size 8k;
 # Do not buffer body of requests.
 proxy_request_buffering off;