mvn spring-boot:run
https://medium.com/@gustavo.ponce.ch/spring-boot-spring-mvc-spring-security-mysql-a5d8545d837d
https://www.mkyong.com/spring-boot/spring-boot-hello-world-example-thymeleaf/
netstat -ano | findstr 8080 taskkill /pid
http://www.thymeleaf.org/doc/articles/petclinic.html http://www.thymeleaf.org/doc/articles/layouts.html https://github.com/thymeleaf/thymeleafexamples-layouts