Introduction
A web application with just plain Hypertext Markup Language (HTML) is quite limiting. We can enhance the look of web pages with Cascading Style Sheets (CSS) and images, and we can add interaction with JavaScript. We call all these kinds of files "static files." They are developed and then deployed as part of the application. We can compare these to dynamic responses, which are generated in real time when a request is made. All the views you have written generate a dynamic response by rendering a template. Note that we will not consider templates to be static files as they are not sent verbatim to a client; instead, they are rendered first and sent as part of a dynamic response.
During development, the static files are created on the developer's machine, and they must then be moved to the production web server. If you have to move to production in a short timeframe (say, a few hours), then it can be time-consuming to collect all the static assets, move...
