Ladies and gentlemen, once upon a time I asked a candidate for Golang Junior Developer position to create a simple Golang REST API server doing something useful (anything useful).
I won't show his code here :) But as a result I realized I don't have my answer to this question :) So, here it is!
This is Golang REST API server example including the following features:
based on high performance, extensible, minimalist Go web framework - Echo - https://echo.labstack.com
made with Clean Architecture in mind (controller -> service -> repository)
has services that work with both PostgreSQL/MySQL database (user/file metadata CRUD) and Google Cloud Storage (file upload/download)
includes service & controller go tests based on database mocks auto-generated with go:generate and mockery (https://github.com/vektra/mockery)