Update README and defaults example

README.md

@@ -1,2 +1,16 @@
 # Linode-Preflight
 A set of Ansible tasks for preflighting a Linode instance.
+
+### Defaults
+
+    preflight__timezone             # Set the timezone
+    
+    firewall__ssh_rule              # UFW rule type for SSH
+
+    user                            # Administrative user to create (replaces root user as default)
+    group                           # Administration group for new user
+    
+    ssh__port                       # Set SSH port (change from 22)
+    ssh__password_authentication    # Password authentication for SSH
+    
+    ssh__keys                       # Array of SSH keys for accessing the instance

defaults/main.yml

@@ -15,3 +15,6 @@ ssh__password_authentication: "no"
 ssh__address_family: "inet"
 
 ssh__keys: []
+# ssh__keys:
+#   - key: ssh-key
+#     state: present