Updated ansible-playbook command to accept a password at the command prompt.

README.md

@@ -51,6 +51,14 @@ cd deployment
 ansible-playbook 01_install_cacert_oidc.yml
 ```
 
+Note: If ansible-playbook fails early in the process with "sudo: a password is required," 
+then confirm that your user has sudo privileges and execute that command like
+
+```shell
+ansible-playbook -K 01_install_cacert_oidc.yml
+```
+
+
 ## Vagrant setup
 
 ```shell