Update README for this branch

README.md

@@ -3,8 +3,28 @@ Sinatra
 
 Brought to you by Lighthouse Labs
 
+## This branch
+
+This branch was created for the breakout session on May 18, 2016 to
+introduce basic acceptance testing and go over how this can be added
+to the Sinatra skeleton, and the basic pattern of these tests.
+
+Acceptance testing can save you filling in form fields over and over
+manually to test your app's behaviour. They're much higher-level than
+unit tests which are generally much more specific and focus on
+code concepts (classes, objects, methods). An acceptance test with Capybara
+will instead verify very high-level behaviour by interacting with an
+application the way a user would and then checking how it "looks".
+
+[Here's a gist with a lot more
+detail.](https://gist.github.com/vaz/a50c26831ff9c27911c0923a906cafef)
+
 ## Getting Started
 
 1. `bundle install`
-2. `shotgun -p 3000 -o 0.0.0.0`
-3. Visit `http://localhost:3000/` in your browser
+2. `RACK_ENV` bundle exec rake db:create
+3. `RACK_ENV` bundle exec rake db:migrate
+4. `bundle exec rspec`
+
+See `spec/spec_helper.rb` and `spec/acceptance/*` especially for
+more detail.