Project Structure

A newly generated project looks like this:

my-saas/
├── cmd/
│   └── api/
├── internal/
│   ├── domain/
│   ├── usecase/
│   ├── delivery/
│   └── infrastructure/
├── migrations/
├── config/
├── pkg/
├── Dockerfile
├── docker-compose.yml
├── Makefile
└── go.mod

Directories

• cmd/api — the API entry point. Loads config, wires dependencies, starts the server.
• internal/domain — entities and repository interfaces.
• internal/usecase — application business rules.
• internal/delivery — HTTP handlers, DTOs and routes.
• internal/infrastructure — database, GORM repositories, logging.
• migrations — database migrations.
• config — Viper configuration.
• pkg — small reusable packages.