Update doc/guides/7 - Hosting and Deployment/2 - Amazon S3 for Upload…

…s.textile

For some reason I had to configure my credential that way to solve this exact issue:
#1278

doc/guides/7 - Hosting and Deployment/2 - Amazon S3 for Uploads.textile

@@ -50,6 +50,19 @@ ENV['S3_BUCKET']='fill_in_your_bucket_name_here'
 
 (Note: For Heroku, you should use config vars to set your environment variables, using Heroku's command line utility. See "Heroku's config vars documentation":http://devcenter.heroku.com/articles/config-vars.)
 
+Another option, expecially if you experience Dragonfly::DataStorage::S3DataStore exceptions, is to configure 
+your Amazon S3 credential using the following syntax:
+
+<ruby>
+Refinery::Core.configure do |config|
+  config.s3_backend = true
+  config.s3_access_key_id = 'fill_in_your_key_here'
+  config.s3_secret_access_key = 'fill_in_your_secret_key_here'
+  config.s3_bucket_name = 'fill_in_your_bucket_name_here'
+  config.s3_region = 'fill_in_your_buckets_region_here' # this one's not always required, default is 'us-east-1'
+end
+<ruby>
+
 h3. Turning S3 on and off
 
 S3 should automatically sense that it is enabled based on these ENV variables