Update figment nginx config

Use a variable for the auth token to keep the config more readable.

Author: Jeff Schroeder

doc/nginx-configs/figment-virt-server-config.conf

@@ -12,6 +12,8 @@
 server {
     listen 7901;
 
+    set $auth_token REPLACE_ME_WITH_YOUR_AUTH_TOKEN;
+
     location / {
         try_files /nonexistent-used-for-try-testing @$http_upgrade;
     }
@@ -24,7 +26,7 @@ server {
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "Upgrade";
         # Figment specific authentication requirement
-        proxy_set_header Authorization REPLACE_ME_WITH_YOUR_AUTH_TOKEN;
+        proxy_set_header Authorization "$auth_token";
         proxy_redirect https://$proxy_host http://$server_name:$server_port;
         proxy_redirect https:// http://;
     }
@@ -35,7 +37,7 @@ server {
         proxy_set_header Host $proxy_host;
         proxy_set_header Connection "";
         # Figment specific authentication requirement
-        proxy_set_header Authorization REPLACE_ME_WITH_YOUR_AUTH_TOKEN;
+        proxy_set_header Authorization "$auth_token";
         proxy_redirect https://$proxy_host http://$server_name:$server_port;
         proxy_redirect https:// http://;
     }