Hi, a little bit of alcohol is okay, but too much is not. For what is okay, and what is not (more than 1-2 drinks a week), you can refer to the link below.
kellymom.com :: Breastfeeding and Alcohol
I have a feeling that the alcohol used in confinement food would easily surpass the 1-2 drinks a week. It's up to you to decide if you want to do away with the alcohol.
But if you are keeping the alcohol, please seek other feeding alternatives for your baby, cos the excess alcohol can really damage your baby's systems.
Personally, I'm not a big believer of the confinement belief that you need alcohol to get rid of the wind in your stomach. I believe that a good tummy binder, a good masseuse, and a good, well-rounded diet can work wonders that alcohol cannot. I think this alcohol myth originated from China where the weather can be so cold that mothers need alcohol to keep them warm.
If in doubt, please check with a certified lact consultant or a pediatrician.