What to eat if having gallbladder attacks?

I have been having (what I believe are) gallbladder attacks. I have a doctor’s appointment later today to be certain.
I have read what to eat/ what not to eat online. However, many websites have contrary advice. For example, some websites say to stay away from coffee, some don’t mention it at all and some actually say to drink it!
I will ask my doc later today. But, I was wondering if anyone else has had them and could give some tips on what to eat/ what not to eat.
Thanks!