I don't hear spite at all I hear a person who was just scared rigid her friend was going to die. This is incredibly traumatic, and I'm sure you shed tears over her during this time.
It is then very hard, I have seen it myself, when the friend who has just survived a life-threatening illness, to do something which will endanger them all over again. I have been in this situation and it is hard not to think 'god, noooooo, don't do that' even if you keep it to yourself (as I did).
I don't think this is a rational well-thought out stance, you have been very upset by your friend's near death, from your understanding (which may or may not be correct) she shouldn't be drinking, and you panicked when you got the text.
Having said all that (and I think the people imputing you don't care for your friend are just incredibly wrong), you a) don't know she will definitely be drinking, she may be suggesting the bottles of wine for you all to share and may take soft drinks herself and b) even if she has a glass of wine, she will have made that decision having the knowledge of what the consultant said which you don't know and b) she is your friend and so go along and see her and celebrate her survival, even if you have to bite your tongue.
I find the attitude towards alcohol on MN really very bizarre. Alcohol is by far the biggest killer of the legal drugs, and middle-class alcoholism a very real problem, but any suggestion that you might want to umm remain sober around your tiny children (1 and 3 do need supervision) is met with disbelief and cries of judgementality. I think having one sober person per small children's outing is extremely important, but I have friends who get regularly as drunk as skunks all afternoon while caring for their children. I hate it. I also have a friend who was exceptionally put out when I failed to agree with her that it was her right to have two large glasses of wine every day when pregnant (so, most of a bottle then) and sure enough, a couple of years in, she was struggling with an alcohol problem. I would have thought not drinking a bottle a day when pregnant, or trying to have one person sober around tiny children were really basic safety steps, I am amazed at the defensiveness here over the 'right to drink' around tiny children.