Support a PORT environment variable.

Author: nuclearsandwich

.gitignore

@@ -1,6 +1,8 @@
 .DS_Store
+.bundle
+.env
 .idea
-Thumbs.db
-.rvmrc
 .ruby-version
+.rvmrc
 .sass-cache
+Thumbs.db

Rakefile

@@ -24,5 +24,5 @@ end
 
 desc "run the site locally (visit http://localhost:9292)"
 task :run do
-  rerun "rackup -s thin"
+  rerun "rackup -s thin -p #{ENV['PORT'] || 9292}"
 end