document required gems in README

yarbro · Apr 13, 2014 · d124001 · d124001
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@@ -13,3 +13,19 @@ for a tutorial on usage.
 Or for more details, this is also the example configuration used in the
 book Reliably Deploying Rails Applications available on Leanpub:
 <https://leanpub.com/deploying_rails_applications>
+
+## Minimal Requirements
+
+You should have the following in your Gemfile:
+
+    gem 'capistrano', '~> 3.1.0'
+
+    # rails specific capistrano funcitons
+    gem 'capistrano-rails', '~> 1.1.0'
+
+    # integrate bundler with capistrano
+    gem 'capistrano-bundler'
+
+    # if you are using RBENV
+    gem 'capistrano-rbenv', "~> 2.0" 
+