Implement catchall for server names accepted by NGINX

Docker/nginx/nginx.conf

@@ -44,10 +44,7 @@ http {
         # note: SSL is handled on incoming traffic by frontend
         listen 8000 default_server;
 
-        server_name api01.cathdb.info
-                    orengoapi01;
-                    #localhost
-                    #127.0.0.1;
+        server_name _;
 
         client_max_body_size 4G;