What's the point of this? Angular App is just a webpage once it's all built, so you bundled it with nginx, a webserver and served it. Not really sure why this

What's the point of this? Angular App is just a webpage once it's all built, so you bundled it with nginx, a webserver and served it. Not really sure why this article was written or how it pertains to Angular, it's just using docker to serve a webpage - kind of fluffy.