chore: add basic inventory for demo-phbern

Signed-off-by: Bert-Jan Fikse <bert-jan@whatwedo.ch>

inventories/demo-phbern/hosts.yml

@@ -0,0 +1,48 @@
+all:
+  children:
+    all_servers:
+      hosts:
+        reverseproxy:
+          ansible_host: 172.16.9.114
+          ansible_user: root
+        application:
+          ansible_host: 172.16.19.111
+          ansible_user: root
+        storage:
+          ansible_host: 172.16.19.112
+          ansible_user: root
+        turn:
+          ansible_host: 172.16.9.115
+          ansible_user: root
+
+    traefik_servers:
+      children:
+        all_servers:
+
+    backend_servers:
+      hosts:
+        application:
+
+    garage_servers:
+      hosts:
+        storage:
+
+    nextcloud_servers:
+      hosts:
+        application:
+
+    opencloud_servers:
+      hosts:
+        application:
+
+    collabora_servers:
+      hosts:
+        application:
+
+    drawio_servers:
+      hosts:
+        application:
+
+    authentik_servers:
+      hosts:
+        application: