I'd like to set up a generic marketing template using the October CMS "Static Pages" plug-in. The intention is to allow my clients to create their own marketing pages. Let's assume that my layout contains HTML similar to this:
<img src="/path/to/image.jpg">
<hr>
<p>Some uneditable copy</p>
{% placeholder copy default title="Main Page Copy" type="html" %}
<h1>Some Awesome Headline</h1>
<p>Sea no omnium deserunt, eum tale movet sensibus te.</p>
{% endplaceholder %}
How could I allow my clients to change the image?