title: How to pre-populate database on a Phoenix application start-up?
body: <p>I have this schema:</p>
  
  <pre><code>schema "editables" do
      field :title, :string 
      field :content, :binary
     timestamps
  end
  </code></pre>
  
  <p>I would like that on application start-up a few rows were automatically created and populated, say I want to create 6 entries with the <code>:title</code> field containing: page1, page2,...
  I should I do it?</p>