updated nginx plus api server block to enable the dashboard

Author: travisamartin

content/includes/use-cases/monitoring/enable-nginx-plus-api.md

@@ -5,24 +5,36 @@ files:
   - content/nginx-one/getting-started.md
 ---
 <!-- include in content/nginx-one/getting-started.md disabled, hopefully temporarily -->
-To collect comprehensive metrics for NGINX Plus--including bytes streamed, information about upstream systems and caches, and counts of all HTTP status codes--add the following to your NGINX Plus configuration file (for example, `/etc/nginx/nginx.conf` or an included file):
+To collect comprehensive metrics for NGINX Plus -- including bytes streamed, information about upstream systems and caches, and counts of all HTTP status codes -- add the following to your NGINX Plus configuration file (for example, `/etc/nginx/nginx.conf` or an included file):
 
 ```nginx
-# Enable the /api/ location with appropriate access control
-# to use the NGINX Plus API.
+# Server block for enabling the NGINX Plus API and dashboard
 #
-location /api/ {
-    api write=on;
-    allow 127.0.0.1;
-    deny all;
-}
-```
+# This block requires NGINX Plus. It turns on the API in write mode
+# and serves the built-in dashboard for monitoring.
+# Change the listen port if 9000 conflicts; 8080 is the conventional API port.
+# For production, secure the API with TLS and limit access by IP or auth.
+server {
+    # Listen for API and dashboard traffic
+    listen 9000 default_server;
+    server_name localhost;
+
+    # Handle API calls under /api/ in read-write mode
+    location /api/ {
+        api write=on;
+    }
 
-This configuration:
+    # Serve the dashboard page at /dashboard.html
+    location = /dashboard.html {
+        root /usr/share/nginx/html;
+    }
 
-- Enables the NGINX Plus API.
-- Allows requests only from `127.0.0.1` (localhost).
-- Blocks all other requests for security.
+    # Redirect any request to the root path “/” to the dashboard
+    location / {
+        return 301 /dashboard.html;
+    }
+}
+```
 
 For more details, see the [NGINX Plus API module documentation](https://nginx.org/en/docs/http/ngx_http_api_module.html).