set default user role per env

.env.sample

@@ -2,6 +2,9 @@ TYPE=wordpress
 TIMEOUT=300
 ENABLE_AUTO_UPDATE=true
 
+# Setup Wordpress settings on each deploy:
+#POST_DEPLOY_CMDS="app core_install"
+
 DOMAIN=wordpress.example.com
 ## Domain aliases
 #EXTRA_DOMAINS=', `www.wordpress.example.com`'
@@ -11,6 +14,11 @@ TITLE="My Example Blog"
 LOCALE="en_US" # de_DE
 ADMIN_EMAIL=admin@example.com
 
+# Every new user is per default subscriber, uncomment to change it
+#DEFAULT_USER_ROLE=administrator
+
+#WORDPRESS_DEBUG=true
+
 ## Additional extensions
 #PHP_EXTENSIONS="calendar"