dima/go-common: Сommon libraries @ 24549ee424cde8613ef1409a24c50c63a944ae77

Dima 24549ee424 Add TX		3 mesiacov pred
..
db.go	b319cf7ffa Update DB	3 mesiacov pred
db_config.go	71418ee77d Update DB (default ssl mode)	7 mesiacov pred
error.go	7612794c8f Add DB	7 mesiacov pred
readme.md	c1444ec377 Add docs	7 mesiacov pred
tx.go	24549ee424 Add TX	3 mesiacov pred

		
				readme.md
			
				Usage example

dbConn, err := db.NewDB(
    db.NewConfig(
        db.WithDriver("mysql"),
        db.WithUsername("username"),
        db.WithPassword("password"),
        db.WithDatabase("db"),        
    ),
)

if err != nil {
    // TODO
}

err = dbConn.Ping()