This. If you have any kind of CPU intensive processing going on in your node application, you will halt the event loop. This makes the whole application unresponsive to other users. Say no to node.
Personally I’d go with java and spring boot. With spring boot you can write a simple restful crud app in minutes: https://spring.io/guides/gs/accessing-data-rest/
Other possibility for quick restful crud app would be ruby on rails.
MongoDB is great if you want awful tooling, awful domain specific query language and inconsistent data.