How do you say goodnight baby sweet dreams i hope you have a good sleep in Spanish?

¡Buenas noches! Que sueñe / sueñen / sueñes / soñéis con los angelitos y cuídese / cuídense / cuídate / cuidaos.

(Literally: 'Good night. May you dream (formal, singular/formal, plural/informal, singular/informal/ plural, informal) with the little angels and take care (with variations as before).'

¡Buenas Noches! Lindos / dulces sueños. Cuídese / cuídense / cuídate / cuidaos.