feat: enable proxy_buffering

docs/README.md

@@ -556,7 +556,6 @@ If you want to replace the default proxy settings for the nginx container, add a
 ```Nginx
 # HTTP 1.1 support
 proxy_http_version 1.1;
-proxy_buffering off;
 proxy_set_header Host $http_host;
 proxy_set_header Upgrade $http_upgrade;
 proxy_set_header Connection $proxy_connection;

nginx.tmpl

@@ -402,7 +402,6 @@ include /etc/nginx/proxy.conf;
 {{- else }}
 # HTTP 1.1 support
 proxy_http_version 1.1;
-proxy_buffering off;
 proxy_set_header Host $host;
 proxy_set_header Upgrade $http_upgrade;
 proxy_set_header Connection $proxy_connection;