references
spring
https://spring.io/quickstart
https://start.spring.io/
Electron Forge
xmpp
https://xmpp.org/getting-started/
tigase
https://docs.tigase.net/en/latest/index.html#
electronjs
GerogeP
mail139
reactjs
typescriptlang
https://www.typescriptlang.org/
mvnrepository
docker
jest-tutorial
http://github.yanhaixiang.com/jest-tutorial/
jenkins
https://www.jenkins.io/
https://www.jenkins.io/zh/