i found one on fdroid but it was old and the directory selector was broken and couldn’t really work outside of it’s default for some reason, it also rendered the page i’m trying to use really weirdly, like it wasn’t sending some file over and the css got borked.
Found one that wasn’t foss, installed it, opened it, “buy premium to unlock this feature”, uninstalled it.
Install termux from f-droid. Then install nginx inside termux. Works great.