Add proxy_ssl_server_name to enable SNI (#284)

Author: DavidS-ovm

nginx/templates/default.conf.template

@@ -7,6 +7,7 @@ server {
     listen ${PROXY_PORT};
 
     proxy_cache off;
+    proxy_ssl_server_name on;
 
     server_tokens off;
     client_max_body_size ${CLIENT_MAX_BODY_SIZE};