Update Web app general

Web-app-general.md

@@ -51,4 +51,20 @@ For example, to see the last 100 lines of logs on **sf-phmon-02**:
 
        sudo systemctl restart <service_name>.service
 
-Replace `<service_name>` with `photodiag-test` or `photodiag-prod`.
+Replace `<service_name>` with `photodiag-test` or `photodiag-prod`.
+
+## Server Monitoring
+
+To monitor the status and performance of the **photodiag-web** servers, you can access real-time server statistics via Grafana. These dashboards show CPU usage, memory consumption, network traffic, and disk I/O, which can help diagnose performance issues.
+
+### **Server Status Links**
+- **sf-phmon-01**: [Grafana Metrics - sf-phmon-01](https://metrics.psi.ch/d/1SL13Nxmz/gfa-linux-tabular?orgId=1&from=now-6h&to=now&timezone=browser&var-env=PEE0939DC8375D041&var-host=sf-phmon-01.psi.ch)
+- **sf-phmon-02**: [Grafana Metrics - sf-phmon-02](https://metrics.psi.ch/d/1SL13Nxmz/gfa-linux-tabular?orgId=1&from=now-6h&to=now&timezone=browser&var-env=PEE0939DC8375D041&var-host=sf-phmon-02.psi.ch)
+
+### **Available Metrics**
+The Grafana dashboards provide the following system performance data:
+
+- **CPU Usage**: Tracks system, user, idle, and I/O wait time.
+- **Memory Usage**: Displays total and used memory statistics.
+- **Network Traffic**: Monitors inbound and outbound data transfer rates.
+- **Disk I/O**: Reports read/write operations per second.