docs, UNIFIAPI v0.1

docs/DEBUG_PHP.md

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+# Debugging backend PHP issues
+
+## Logs in UI
+
+![Logs UI](./img/DEBUG/maintenance_debug_php.png)
+
+You can view recent backend PHP errors directly in the **Maintenance > Logs** section of the UI. This provides quick access to logs without needing terminal access.
+
+## Accessing logs directly
+
+Sometimes, the UI might not be accessible. In that case, you can access the logs directly inside the container.
+
+### Step-by-step:
+
+1. **Open a shell into the container:**
+
+   ```bash
+   docker exec -it netalertx /bin/sh
+   ```
+
+2. **Check the NGINX error log:**
+
+   ```bash
+   cat /var/log/nginx/error.log
+   ```
+
+3. **Check the PHP application error log:**
+
+   ```bash
+   cat /app/log/app.php_errors.log
+   ```
+
+These logs will help identify syntax issues, fatal errors, or startup problems when the UI fails to load properly.
+