Adding comprehensive comments

portainer-agent/docker-compose.yml

@@ -1,10 +1,16 @@
+# Portainer Agent Configuration
 services:
   portainer-agent:
+    # Basic container configuration
     container_name: portainer-agent
     image: docker.io/portainer/agent:latest
     restart: unless-stopped
+
+    # System access configuration
     volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
-      - /var/lib/docker/volumes:/var/lib/docker/volumes
+      - /var/run/docker.sock:/var/run/docker.sock  # Docker API access
+      - /var/lib/docker/volumes:/var/lib/docker/volumes  # Volume management
+    
+    # Network port configuration
     ports:
-      - 9001:9001
+      - 9001:9001  # Agent communication port