wtf is spring-boot-demo?

This project, called spring-boot-demo, is a simple demonstration application designed to showcase how SonarQube works. SonarQube is a popular tool that automatically checks code for bugs, security vulnerabilities, and messy coding practices. Think of this demo as a practice target, a sample piece of software that developers can scan to see how automated code quality checking functions in a real-world scenario. When the application is running, it provides a very basic web link that displays the text "Hello! Docker!" in a browser. It is essentially a tiny, functioning web server rather than a complex application. The main purpose is to provide a real piece of runnable code that can be put through the wringer of a code quality scanner. To use it, a developer runs a couple of commands that process the project and send it off to a SonarQube server for evaluation. The server then inspects the code and generates a detailed report. This helps teams see exactly what a code quality dashboard looks like and how to configure their own development tools to submit code for automated review. This demo would be useful for engineering team leads, quality assurance professionals, or developers who are setting up SonarQube for the first time. Instead of testing a new code-scanning system on critical business software, they can safely experiment with this simple project to ensure their scanning setup correctly catches issues and reports metrics before applying it to their real work. The README is quite sparse and doesn't go into detail about the underlying structure of the application or any advanced configuration. It assumes the person running it already has a SonarQube server up and running, as you need to provide your own server address and login credentials to complete the scan. The presence of "Docker" in the greeting suggests it is meant to be run in a containerized environment, though the documentation focuses strictly on the code-scanning commands.