Recommended setup for persisting data

Hi,

I am writing an app for a friend of mine who has a bakery. His requirements are quite simple, he would like a system where he can add all the items he sells in the bakery to the application and then be able to take preorders from his clients and record all of the orders to be later printed out daily for the bakers.

I chose electron because I wanted to make it cross platform and he only wants to run it on his laptop without a connection to the internet. I am going to need to use a database to persist the data.

I am comfortable in js jquery and I am learning angular but I figure I can write the whole thing in javascript/html and have some way of interacting with the database. I am having trouble finding the best approach for these requirements, I am still a beginner when it comes to this so I would really appreciate any recommendations.