The Structurizr on-premises installation is a standalone version of Structurizr that can be run locally on your own infrastructure. It’s a Jakarta EE/Spring 6 web application, packaged as a .war file, for deployment into any compatible Jakarta EE server, such as Apache Tomcat 10. For ease of deployment, by default, all data is stored on the local file system.
See https://docs.structurizr.com/onpremises for documentation.