service postgresql start
service postgresql status
source /etc/profile
grails create-controller hello
grails run-app -port=7950
grails create-domain-class Person
grails create-interceptor OttoInterceptor
https://www.easck.com/cos/2022/0528/956985.shtml
grails package
sudo docker build . -t otto-grail-app:latest
sudo docker images
sudo docker run -d --name otto-grails-app --net=host otto-grail-app
sudo docker ps