Setting up STATIC_URL dynamically

If you set STATIC_URL to a static value, then each time you update a CSS file, a JavaScript file, or an image, you and your website visitors will need to clear the browser cache in order to see the changes. There is a trick to work around clearing the browser's cache. It is to have the timestamp of the latest changes shown in STATIC_URL. Whenever the code is updated, the visitor's browser will force the loading of all new static files.

In this recipe, we will see how to put a timestamp in STATIC_URL for Git users.