What about the tech stack?
I developed scrumpoker.works in Java. As web framework I used Microprofile / Quarkus. It’s a smart choice when you want to go serverless. For the frontend javascript react with material ui (mui) is performing perfectly.
As source code repository I use gitlab.
Lets have a look at the infrastructure for production. Nowadays using a cloud is standard. I opted for google cloud plattform (gcp). In GCP there are again some options. Google app engine (GAE) is a great technological option as you can focus on the java application. But as I use server sent events (SSE) I needed to switch to google cloud run (GCR). And happily discovered GCR as the more modern and even cost saving variant.
