Revize ae654ef7

Database exported to script
- removed initialization from application
- updated docker-compose.yml to create volume and add data from script

re #9746

backend/src/main/java/cz/zcu/kiv/backendapi/user/UserServiceImpl.java

@@ -103 +103 @@
         userRepository.save(userEntity);
     }
 
-    //TODO maybe check if user is not deleting himself - or it might be ok
     @Override
     public void deleteUser(String username) {
         UserEntity userEntity = userRepository.findByEmail(username).orElseThrow(() -> {