Eu descobri o problema. Veja o comentário de Paulo acima. Aqui está o meu comentário com o que eu fiz para corrigir o problema:
I figured it out. The nginx conf was pointed at my wordpress install but there was an index.html which contained the "welcome to nginx" AND an index.php which was the wordpress index. I guess nginx defaults to index.html when both files exist? Anyways, I moved the index.html file to index.html_bak and the wordpress site loads correctly now. I really didn't know where to start so thank you for just getting me started looking somewhere