Couple of issues: that's a super tiny frame (47cm?) so the short head tube means you're going to need to either raise the stem to max height, and if that doesn't work, get a Nitto tallux stem from Rivendell bikes so you can get some space to fit a basket in there. I wouldn't recommend a handlebar that sweeps back because the handling will get super twitchy, especially with weight loaded on the front in a basket. You should go with a riser bar or maybe something like a VO Milano bar. For a WALD basket, I like the model # 139

...or you could slap one of these bad boys on your bike without changing a thing, and be done with it:
https://www.ridepdw.com/goods/cargo/takeout-basket