Run a web server to provide an OpenBSD autoinstall(8) file:
$ go run openbsd_autoinstall.go install.conf
serving /install.conf on port 8000
Modify the install.conf file as needed.
Make sure to use port 8000 when defining the http source for the autoinstall
file, e.g. http://192.168.1.1:8000/install.conf.