The Eclipse Jetty Operations Guide targets sysops, devops, and developers who want to install Eclipse Jetty as a standalone server to deploy web applications.
The Eclipse Jetty Programming Guide targets developers who want to use the Eclipse Jetty libraries in their applications, and advanced sysops/devops that want to customize the deployment of web applications.
The Eclipse Jetty Programming Guide targets developers that wish to contribute to the Jetty Project with code patches or documentation improvements.
The guides above are a work in progress for the current Jetty version.
The old Jetty documentation refers to old Jetty versions, and it is currently being ported to the current Jetty version.