Web sit on a raspberry pi

[#1]

I have a ddns service....................... aaaagile.ddns.net
I have a static IP address ................212.159.nn.nn
What settings do i need to make on my poxy modem ...... Technicolor TG582n
All helpful settings advice (in words of one sylable)  gratefully received  🙂

[#2]

You need to setup port forwarding to port 80 on the Pi
https://support.zen.co.uk/kb/Knowledgebase/Broadband-Technicolor-TG-582-Configure-Port-Forwarding
There's little point in masking your IP address if you then quote the full domain name that resolves to it by the way!