This is typical Maven+Spring Boot project. You need at least Java 14. You can compile, package project with your normal commands:
./mvnw clean compile test package
After building, you can run it like this:
java --enable-preview -jar target/piifaker-0.0.1-SNAPSHOT.jar
Once running, app should respond in port 8080. So point your browser to http://localhost:8080/person for a quick test. It should generate and return Person construct as JSON.