FIX: Forgot to include a file in the previous commit :)

db/migrate/20160823171911_add_path_whitelist_to_embeddable_hosts.rb

@@ -0,0 +1,5 @@
+class AddPathWhitelistToEmbeddableHosts < ActiveRecord::Migration
+  def change
+    add_column :embeddable_hosts, :path_whitelist, :string
+  end
+end