This is a wonderful article!!
I have been postponing one of my live websites to be moved to do SSR. However, after seeing your article I was able to do it without any fear. It was a 100% success!!!
However, serverless offline plugin has got so many breaking changes that I noted once I did some testing on a new node project. I think few commenters are getting 404, probably due to new flags they've introduced.
Keep it up mate. Superb!