wtf is php-image-multiarch?

This project provides a ready-made setup for packaging an old-school PHP website so it can run on virtually any computer or server. Instead of wrestling with installing PHP, configuring a web server, and making sure the right versions match your system, you get a single blueprint that bundles everything together and just works. The core idea relies on a concept called containerization. Think of it like a shipping container: your website and all its supporting software are packed inside a standardized box. A file called a Dockerfile acts as the instructions for building that box. What makes this particular setup special is that it is "multi-architecture." In plain terms, that means the same set of instructions can build versions of the box that run natively on different types of computer processors, like the Intel chips found in most traditional servers and the ARM chips used by newer cloud providers and Apple computers. Someone would use this if they are maintaining or reviving an older PHP website and want a modern, reliable way to deploy it without surprises. For example, a founder or project manager who needs to move a legacy site to a new cloud hosting provider could use this approach to avoid spending hours debugging server configuration. It lets the site be picked up and moved to a new environment with minimal friction. The README doesn't go into detail about specific features or instructions, so it is best treated as a starting point for someone familiar with the basics of Docker. The clear value proposition is portability: it handles the heavy lifting of making sure an older PHP application runs consistently, regardless of the underlying hardware.