I don’t think I really understood docker until I watched this video which takes you through building up a docker-like container system from scratch. It’s very understandable and easy to follow if you have a basic understanding of Linux operating systems. I recommend it to anyone I know working with docker:
Alternative Invidious link: https://yewtu.be/watch?v=8fi7uSYlOdc
The cables are often not run in ducts they’re just tacked to the studwork in the house before the plasterboard goes up. This means any new cable is basically a fresh install.