Include key:generate command

services/hashing-encryption.md

@@ -2,7 +2,13 @@
 
 ## Configuration
 
-When you first installed Winter, a random key should have been generated for you. You can confirm this by checking the `key` option of your `config/app.php` configuration file. If the key remains unchanged, you should set it to a 32 character, random string. If this value is not properly set, all encrypted values will be insecure.
+When you first installed Winter, a random key should have been generated for you. You can confirm this by checking the `key` option of your `config/app.php` configuration file, or the `APP_KEY` of your `.env` file. If the key remains unchanged, you should set it to a 32 character, random string. If this value is not properly set, all encrypted values will be insecure.
+
+To set this key you can run
+
+```bash
+php artisan key:generate
+```
 
 ## Hashing