- login (simple)
    ? - https://www.bezkoder.com/angular-12-jwt-auth/
    ? - https://martinelli.ch/angular-15-spring-boot-3-and-jwt/
    - https://www.baeldung.com/spring-deprecated-websecurityconfigureradapter

    CRUD: https://www.javatpoint.com/angular-spring-crud-example

    backend url: http://192.168.178.21:8182/api-0.0.1-SNAPSHOT/hello
    solution maybe root.jar: https://stackoverflow.com/questions/40714904/after-deployment-of-war-to-tomcat-docker-container-always-getting-404
    
- backend
    - package is com.rossa with artifactName api
    - addNumber(number, contract, date)
        - wasser
        - abwasser
        - LWP
        - hausstrom
    - getEntries(contract)
        - siehe oben
    - add swagger api doku

- frontend
    - overview energy
    - details energy
    - overview water
    - details water
    - add entry (for all)
    - add angular material

todo: authentication https://www.javaguides.net/2019/04/spring-boot-spring-security-angular-example-tutorial.html