Update README.md

Author: vb-cmd

README.md

@@ -7,4 +7,16 @@ You must create and add client ID and secret key
 `ENV['GOOGLE_CLIENT_ID']` and `ENV['GOOGLE_CLIENT_SECRET']`
 
 #### Facebook
-`ENV['FACEBOOK_APP_ID']` and `ENV['FACEBOOK_APP_SECRET']`
+`ENV['FACEBOOK_APP_ID']` and `ENV['FACEBOOK_APP_SECRET']`
+
+#### PostgreSql: production
+
+database: `<%= ENV['PG_DATABASE'] %>`
+
+username: `<%= ENV['PG_USER'] %> `
+
+password: `<%= ENV['PG_PASSWORD'] %>`
+
+host: `<%= ENV['PG_HOST'] %>`
+
+port: `<%= ENV['PG_PORT'] %>`