I am very, very excited about this: the Camunda community now actively collaborates around providing support for Spring Boot.
This is extremely cool and allows users to deploy Camunda process engine including the Rest Api and the Webapplication in Spring Boot.
The project is in a very early stage, if you want to participate, join the ongoing discussion on the dev list and checkout the sources in GitHub!
Many thanks to Oliver Steinhauer who provided an initial implementation that the community decided to collaborate around.