README.md in otacrawler-0.1.1 vs README.md in otacrawler-0.1.2

@@ -19,20 +19,37 @@
 
     $ gem install crawler
 
 ## Usage
 
+Setting database:
+```YAML
+# database.yml
+development:
+  adapter:  mysql2
+  host:     localhost
+  username: root
+  database: otacrawler
+
+production:
+  adapter:  mysql2
+  host:     xxxx
+  username: xxxx
+  database: otacrawler
+```
+
 Run robot:
 
 ```ruby
   require 'otacrawler'
   Otacrawler::Robot.new.run
 ```
 
 ## ENV
 
 ```
-DATABASE_SETTING_PATH - Database setting file path. It formatted YAML.
+DATABASE_SETTING_PATH - Database setting file path. That file formatted YAML.
+OTACRAWLER_ENV        - Setting environment. This doesn't overrides the value of the environment variable RAILS_ENV.
 ```
 
 ## 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`.