Folders, Apartments, and Fake Computers: A Guide to Virtual Environments, Docker, and VMs

Introduction If you have been spending a substantial amount of time writing code, you must have run into a frustrating problem: "It works on my computer, but it doesn't work on yours." This happens because computers are set up differently. You might have a different operating system, a different version of a programming language, or different background software running. When a website or app breaks because of this, developers can lose hours or even days trying to figure out what the problem is.