you're hosting a web server on your home network? not the greatest idea but OK.
I suggest setting up dynamic DNS just in case your IP changes, and as the user above me has said, just point the DNS A record to the dynamic DNS (a.k.a your public IP)
EDIT: you should also use cloudflare for ddos protection / security and to hide your public home IP, just remember to use an external server such as a vps for mail to make it more difficult to get the IP behind the CF
I suggest setting up dynamic DNS just in case your IP changes, and as the user above me has said, just point the DNS A record to the dynamic DNS (a.k.a your public IP)
EDIT: you should also use cloudflare for ddos protection / security and to hide your public home IP, just remember to use an external server such as a vps for mail to make it more difficult to get the IP behind the CF