Type 1 diabetes is indicative of messed up gut bacteria. Your gut bacteria can get screwed up from antibiotic usage, c-section birth, not being breastfed, bad diet and a number of other phenomenon. Drinking alcohol at the rate you are describing will also destroy what was ever left of your beneficial gut bacteria.
When your gut bacteria become imbalanced pathogenic bacteria, parasites, and fungi like candida can essentially take over your digestive tract and cause you to inadequately digest food. Undigested food proteins can then enter your blood stream along with toxins that are the byproduct of fermentation of your food by pathogenic organisms. These toxins as well as undigested proteins are the cause of your skin problems.
Initially you should be able to control your skin problems by avoiding difficult to digest foods mainly gluten found in most grain products as well as in beer, and casein found in most dairy products. You may also find yourself sensitive to things like eggs, nuts, and shellfish as everyone has different sensitivities when the gut bacteria is messed up.
To fix your bacteria you will need to start taking probiotics (beneficial bacteria) as well as consuming fibers that they feed on so that they can recolonize your digestive tract and fight back the pathogenic stuff that is screwing you up. People have different opinions on how it is best to do this. My advice would be to buy a well regarded probiotic like prescript assist and start taking it along with 1 table spoon of either raw potato starch, psyllim, inulin or a combination of the above. You can also buy prebiotic fiber supplements that have combinations of different types of soluble fiber which feeds probiotic bacteria. If you tolerate this approach without getting worse skin breakouts then I would continue to increase the fiber dosage slowly and spread throughout the day until you are at around 5 tablespoons of prebiotic fiber. If you aren’t able to tolerate this approach then your pathogenic overgrowths might be more severe and you might consider taking an antifungal like thorne sf722 (can take months to fully eradicate candida), or a parasite cleanse like gaia’s para shield and restarting the probiotic and fiber a week or so later. You can also experiment with different brands of probiotics, but I have had the most success with prescript assist and natren’s healthy trinity.