How do I create an RPC backend with Google’s Protocol Buffers, NodeJS and NestJS? Part I: Protocol Buffers 0 (0)

Part I: Protocol Buffers

You have a new idea for an app. This should communicate strongly with a web server? Many would now start to write a RESTful-Api. Nice and old-fashioned. Maybe a little refreshed by Swagger. But in the end a JSON output of the database query. Readable for both man and machine. Why change anything?