added ansible.cfg for hosts file

ansible.cfg

@@ -0,0 +1,2 @@
+[defaults]
+inventory=hosts.yml

hosts.yml

@@ -9,13 +9,19 @@
 #   - You can enter hostnames or ip addresses
 #   - A hostname/ip can be a member of multiple groups
 
-[anygroup]
-server1     ansible_host=192.168.0.1
-server2     ansible_host=192.168.0.2
-server3     ansible_host=192.168.0.3
-server4     ansible_host=192.168.0.4
+anygroup:
+  hosts:
+    server1:
+      ansible_host: 192.168.0.1
+    server2:
+      ansible_host: 192.168.0.2
+    server3:
+      ansible_host: 192.168.0.3
+    server4:
+      ansible_host: 192.168.0.4
 
 # Add your own groups here. Hosts can be added to multiple groups like so:
-# [anothergroup]
-# server[1:3]
-# anotherserver     ansible_host=192.168.0.10
+# anothergroup:
+#   server[1:3]:
+#   anotherserver:
+#     ansible_host: 192.168.0.10