GitLab

 - introduces auth package, for common (sam, crm) auth handlers
 - routes are now generated inside server package, each handler got its own MountRoutes(r chi.Router, middlewares ...func(http.Handler) http.Handler)
 - there MountRoute methods are now called from non-generated code so we can inject services to (rest) controllers

For dsn & addr: explicit config via flag has priority over env variables. Final failsafe is hardcoded default values

Env variables:
 - SAM_DB_DSN
 - SAM_HTTP_ADDR