Hello,
You should run your project on local using NodeJS 10 if work fine then deploy. I have experience in upgrading NodeJS application and I think I can help you. let me know when we can discuss.
I am Sr. full stack developer & DevOps with 6+ years of experience. I have experience in Java, JavaScript, NodeJS, ExpressJS, AngularJS, Angular, GraphQL, RESTful, MongoDB, MySQL, PostgreSQL, Linux, Nginx, Apache, AWS, Git, etc.
Looking forward to working with you.
Thanks