#!/bin/sh
set -eu

if [ -z "${CADDY_SOURCE_CIDR:-}" ]; then
    echo "CADDY_SOURCE_CIDR is required" >&2
    exit 1
fi

envsubst '${CADDY_SOURCE_CIDR}' \
    < /etc/image/default.conf.template \
    > /tmp/nginx.conf

exec nginx -c /tmp/nginx.conf -g 'daemon off;'