Hey @AaronP,
Where are you setting the production branch so that things work? That makes me wonder if there’s an node_env setting somewhere that’s set to ‘development’ in every other case, so not installing your mysql package whenever you expect. Could that be possible?
I’m also seeing in the file structure you listed about that there’s a server directory. It seems like you may already know this and have gotten your app running in some cases, but just in case: on Netlify, there’s no server at runtime, so you won’t be able to run a database on Netlify: