Nested structs in Golang (resource for the story on Medium)

top_level_structs.go

type Config struct {
    Server     Server     `json:"server"`
    Postgres   Postgres   `json:"postgres"`
}

type Server struct {
    Host string `json:"host"`
    Port string `json:"port"`
}

type Postgres struct {
    Host     string `json:"host"`
    User     string `json:"user"`
    Password string `json:"password"`
    DB       string `json:"db"`
}