Hi,
I am experienean AWS and Linux expert with a good experience with Docker. I can help you write a custom Dockerfile for your MERN project to which can assist you in quick test/deployments of your NodeJS/MERN code.
PS. I cannot help you working on any NodeJS code, I am well familiar with it but my work and experience is pretty tied to Linux, Docker, DevOps, Cloud (AWS), etc.
Should you need help, hit the chat button?
Best,
A