hello world about websocket with Spring, Sockjs, Stomp
run spring boot
./gradlew bootRun
continue deploy static resources
./gradlew -t processResources
http://spring.io/guides/gs/messaging-stomp-websocket/
http://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html
https://docs.spring.io/spring-boot/docs/current/reference/html/using-boot-devtools.html