func main() {
    router := app.CreateRouter(app.Routes())
    log.Fatal(http.ListenAndServe(":8080", router))
}

type Config struct {
    DB *sql.DB
}

func (c *Config) connectToDB() {
    connectionString := fmt.Sprintf("user=%s password=%s dbname=%s sslmode=disable", os.Getenv("DB_USERNAME"), os.Getenv("DB_PASSWORD"), os.Getenv("DB_NAME"))
    var err error
    c.DB, err = sql.Open("postgres", connectionString)
    if err != nil {
        log.Fatal(err)
    }
}

func init() {
    c := Config{}
    c.connectToDB()
}

func UserIndex(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
    fmt.Fprint(w, "test!n")
}