dress code?

Nope. Never. Please come as you are. We do expect everyone to be considerate of everyone else and to dress with basic modesty, but we don't require or expect 'formal-wear' at all. 
You'll notice that at the same time that many of us dress casually, others of us like to dress up in our Sunday best. Please know that this isn't an attempt to gain piety-points with God. It's just a choice that some make based on the kind of special event which we cherish worship to be. But we all cherish the unity that we have in worship, regardless of individual choices about things like clothing styles.