A bad jquery CRUD for an IFSC class that I teach I know, it's horrible, but I have some excuses, I'm used to React and Angular, not shitty Jquery
To make things have open cmd and use a python server in frontend folder https://www.python.org/downloads/
python -m SimpleHTTPServer 8000
Outro servidor pode ser este, coloque a pasta front end na pasta htdocs
https://sourceforge.net/projects/miniweb/?source=typ_redirect
to run backend use in backend folder
mvn clean install
java -jar ./target/cadastro-cliente-0.0.1-SNAPSHOT.jar