README.md in ucb_rails_cli-1.1.0 vs README.md in ucb_rails_cli-1.2.0

@@ -19,10 +19,17 @@
   * Ruby >= 2.3
   * Rails >= 5.1
 
 Older versions of these might work, but haven't been tested.
 
+You also need the master key to [decrypt credentials stored in the generated `config/credentials.yml.enc` file.](https://www.engineyard.com/blog/rails-encrypted-credentials-on-rails-5.2) You can set this up by storing the key in either:
+
+  * the `RAILS_MASTER_KEY` environment variable, or:
+  * a file located at `~/.ucb_rails_master_key`
+  
+If one of these options is not set, you won't be able to generate a new app.
+
 ## Bootstrap version
 
 Version 1.0 of this gem uses Bootstrap 4. Use version 0.9.0 if you need Bootstrap 3
 
 ## Installation
@@ -52,11 +59,9 @@
 ```bash
 cd my_app_name
 bin/rake db:create
 bin/rake db:migrate
 ```
-
-then open `config/config.yml` and add the username and password to access LDAP (you can get these credentials from another developer).
 
 Now you can start the server:
 
 ```bash
 bin/rails s