README.md in otacrawler-0.1.0 vs README.md in otacrawler-0.1.1

@@ -21,10 +21,19 @@
 
 ## Usage
 
 Run robot:
 
-    $ bin/otacrawler
+```ruby
+  require 'otacrawler'
+  Otacrawler::Robot.new.run
+```
+
+## ENV
+
+```
+DATABASE_SETTING_PATH - Database setting file path. It formatted YAML.
+```
 
 ## Development
 
 If you want to add crawling sites, you add that site to `Otacrawler::Sites`. At that time, you should inherit the site from `Otacrawler::Sites::Base`.