Where in "The Great Gatsby" does it mention that Gatsby made his money running a speakeasy?

I haven't read this in a couple years and I would have to look it up. The reason why I'm posting this is because recently I've realized that F Scott Fitzgerald is my favorite writer. Everyone knows him through the Great Gatsby but he's written so many other great stories. I have one book that is filled with his short stories and I love it. They're all about 30 pages so you can read them each in a day. I just wanted to let you know that if you like this story, buy one of his short story books. They're amazing. I'm an English major so I read tons of stuff from different people and he is my favorite. I'm hoping that if you like this story then you might check out others and you won't be dissapointed. He's definetly one of the great writers of the twentieth century. But hey, sorry I didn't answer your question