Add infrastructure hosts to inventory

Added hosts organized by role:
- dbservers: postgres, mysql, mongo
- webservers: nginx, npm (nginx proxy manager)
- infrastructure: docker, pihole
- control: ansible-node

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

inventory/hosts.yml

@@ -1,16 +1,33 @@
 ---
 all:
   children:
-    # Example group structure - customize as needed
-    webservers:
+    control:
       hosts:
-        # web1:
-        #   ansible_host: 192.168.1.10
+        ansible-node:
+          ansible_host: 192.168.200.106
 
     dbservers:
       hosts:
-        # db1:
-        #   ansible_host: 192.168.1.20
+        postgres:
+          ansible_host: 192.168.200.103
+        mysql:
+          ansible_host: 192.168.200.110
+        mongo:
+          ansible_host: 192.168.200.111
+
+    webservers:
+      hosts:
+        nginx:
+          ansible_host: 192.168.200.65
+        npm:
+          ansible_host: 192.168.200.101
+
+    infrastructure:
+      hosts:
+        docker:
+          ansible_host: 192.168.200.200
+        pihole:
+          ansible_host: 192.168.200.100
 
     local:
       hosts: