That's a great idea - cooking the chicken in the pizza oven - good thinking!
With chicken that comes from unknown sources I think the thinking is to not eat the skin - someone else can confirm or debunk that...
As for what to do to it... You could make up a spice blend that you like, and bring it along with you, and rub that on the chicken before baking. You could also buy one, but a lot of them have sugar in them, so you might want to google homemade spice blends or something.
If you have time to marinate the chicken for a couple of hours this is one of my favourite marinades to use before BBQing and it would also work well in a pizza oven I imagine.
1/4 c coconut milk (or sub yogurt if you're ok with dairy, which is how I made this for years while eating CW since I was looking for ways to cut fat in those days)
2 Tb. lime juice
some crushed red chilis (or use a bit of cayenne if you can't crush chilis, or find something like "sambal oelek")
1 1/2 tsp fresh basil
1/2 tsp cumin
1/2 tsp crushed coriander seed
1 1/2 tsp fish sauce
You could get your marinade ready in the morning before work and take it along in a container to work and throw the chicken into it when you get there.
EDIT: when baking your chicken prick it with a fork to test for doneness. If the juices run clear then it is done. Pieces with bone in will take longer to cook than without and the time will also depend on how hot the spot is in the oven that you are placing it. If the spot is too hot then the chicken will burn before it done inside. I imagine 30 to 45 minutes...