Add http-host script

#!/bin/bash

die() { echo >&2 "Fatal: $*"; exit 2; }

set -eu

declare -a opts

declare -i port

test ${port:=${1? A port number is required}} -gt 0 &&

	opts+=(--publish $port:80) ||

	die "invalid port: $1"

while shift && let $#; do

	opts+=(--volume $(realpath -e "${1%%:*}")":/usr/share/nginx/html/${1#*:}")

done

exec docker run "${opts[@]}" nginx