Hide NGINX version (#2305)

Problem: As a user of NGF, I want the NGINX version of my installation of NGF hidden by default, so that I do not inadvertently expose which vulnerabilities my version of NGINX is vulnerable to.

Solution: Hide the nginx version that's included in responses.

Author: sjberman

internal/mode/static/nginx/conf/nginx-plus.conf

@@ -27,6 +27,8 @@ http {
   sendfile on;
   tcp_nopush on;
 
+  server_tokens off;
+
   server {
     listen 127.0.0.1:8765;
     root /usr/share/nginx/html;

internal/mode/static/nginx/conf/nginx.conf

@@ -27,6 +27,8 @@ http {
   sendfile on;
   tcp_nopush on;
 
+  server_tokens off;
+
   server {
     listen unix:/var/run/nginx/nginx-status.sock;
     access_log off;