hey there, welcome.
My first question is - are you trying to deploy both parts of the app on netlify? the frontend shouldn’t be a problem, just connect the repo to netlify or even drag n drop if it doesn’t need a build step and you should be close to done. But if you are trying to deploy the server part or add data storage, that might get tricky.
i recommend this post as a good first starting point, to understand whether we can support your backend or not so much:
give that a read through, and let us know which questions you have.