Add Agent V3 diagram description

Author: CVanF5

content/agent/about.md

@@ -21,9 +21,7 @@ The F5 NGINX Agent is a lightweight companion daemon designed to work with NGINX
 
     - [OpenTelemetry](https://opentelemetry.io/) support comes with F5 NGINX Agent, and the ability to [export the metrics data]({{< relref "/agent/otel/configure-otel-metrics.md" >}}) for use in other applications.
 
----
 
-## How it works
 
 ### Configuration management
 
@@ -36,12 +34,9 @@ The F5 NGINX Agent is a lightweight companion daemon designed to work with NGINX
 - This embedded collector gathers vital performance and health metrics for both NGINX and the underlying instance it operates on.  
 - For example, it tracks key metrics such as active connections, requests per second, HTTP status codes, and response times. Additionally, it collects system-level data, including CPU usage, memory consumption, and disk I/O. These insights provide deep observability into NGINX's behavior, enabling teams to troubleshoot issues effectively, optimize performance, and maintain high availability.  
 - Collected metrics can be seamlessly exported to the NGINX One Console or integrated with third-party data aggregators.
-    
-
-
-
-{{< img src="agent-flow.png" caption="How Agent works" alt="How NGINX Agent works" width="99%">}}
 
+### How Agent works
+---
 ```mermaid
 graph BT
 
@@ -55,9 +50,9 @@ graph BT
     style ErrorLogs fill:#b5e0b6,stroke:#008000,stroke-width:2px,color:#000000
     style Agent fill:#b5e0b6,stroke:#008000,stroke-width:2px,color:#000000
 
-    subgraph ManagementPlane["Management Plane"]
+    subgraph ManagementPlane["NGINX One"]
         CommandControl["Command Server"]
-        OTelManagementPlane["OTel Collector"]
+        OTelManagementPlane["OTel Receiver"]
     end
 
     subgraph Compute["NGINX Instance"]
@@ -81,5 +76,17 @@ graph BT
 
     Compute <--> |gRPC| ManagementPlane
 ```
----
+
+The figure shows:
+
+- An NGINX Instance running on bare metal, virtual machine or container
+- The NGINX One Cloud Console includes:
+  - Command Server to manage NGINX configurations, push new/updated configuration files remotely, perform integrity tests, and automatically roll back to last good configuration if issues are detected.
+  - OpenTelemetry (OTel) Receiver that receives observability data from connected Agent instances.
+- An Agent Process running on the NGINX Instance. The Agent is responsible for:
+  - Watching, applying, validating, and managing rollback operations on NGINX configuration files.
+  - Embedding an OpenTelemetry Collector, collecting metrics from both NGINX processes and host system performance data, then securely passing metric data to the NGINX One Cloud Console.
+- Collection and monitoring of Host Metrics (CPU usage, Memory utilization, Disk I/O).
+- Management and troubleshooting features leveraging NGINX Configuration Files, NGINX Logs (both access and error), and process-level metrics.
+- Collected data is made available on the NGINX One Cloud Console for monitoring, alerting, troubleshooting, and capacity planning purposes.
 

go.mod

@@ -2,4 +2,4 @@ module github.com/nginxinc/docs
 
 go 1.19
 
-require github.com/nginxinc/nginx-hugo-theme v0.42.24 // indirect
+require github.com/nginxinc/nginx-hugo-theme v0.42.25 // indirect

go.sum

@@ -4,3 +4,5 @@ github.com/nginxinc/nginx-hugo-theme v0.41.27 h1:M8ttO1ZkTGY06o0MYvnm3kc/sA6lOmI
 github.com/nginxinc/nginx-hugo-theme v0.41.27/go.mod h1:DPNgSS5QYxkjH/BfH4uPDiTfODqWJ50NKZdorguom8M=
 github.com/nginxinc/nginx-hugo-theme v0.42.24 h1:aQkkTob0EpK+1ID+31E3y+RIdThldC4HgA2LcJL4TXU=
 github.com/nginxinc/nginx-hugo-theme v0.42.24/go.mod h1:DPNgSS5QYxkjH/BfH4uPDiTfODqWJ50NKZdorguom8M=
+github.com/nginxinc/nginx-hugo-theme v0.42.25 h1:QkLTREuOohkq+hmBZCfWELAri4AOvhc6gmIJA1esUfo=
+github.com/nginxinc/nginx-hugo-theme v0.42.25/go.mod h1:DPNgSS5QYxkjH/BfH4uPDiTfODqWJ50NKZdorguom8M=