Build LAMP Server:
https://www.tecmint.com/install-lamp-on-debian-10-server/
Where is my site?
https://www.tecmint.com/find-apache-documentroot-in-linux/
# grep -i 'DocumentRoot' /etc/apache2/sites-available/000-default.conf
DocumentRoot /var/www/html
# grep -i 'DocumentRoot' /etc/apache2/sites-available/default-ssl.conf
DocumentRoot /var/www/html
Install DNSMasq (in case it's not already installed):
# apt install dnsmasq
Append to /etc/dnsmasq.conf
interface=eth1
address=/ufo.mars/10.0.10.1
dhcp-range=eth1,10.0.10.20,10.0.10.25,12h
Follow this guide starting from: "# ANNEX C. # MARIA'S STUFF"
http://nelus.tpt.edu.ee/txt/K2C60-ArchDay2and3.txt
On rescue machine (connected to Gateway NIC eth1) Show this home page.
It should look so:

Create web page with containing joker.html source, and show this with resque machine browser:
