smallish fix for better compatibility maybe

nginx-proxy/default.conf.template

@@ -14,6 +14,7 @@ server {
 
     location / {
         proxy_pass http://$proxy_connection;
+        proxy_http_version 1.1;         # Override default HTTP/1.0
         proxy_set_header Host localhost;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;