Assign Public IP to a windows 2019 server behind Mikrotik RB2011UiAS-2HnD

Dear members,

It is my first time to use Mikrotik router, and I have an issue that will seem to you easy but I really need your help.

I searched the whole forum but all info are confusing and not match my case.

The scenario is this:

I have a mikrotik router directly connected to my ISP using a static IP via Eth1
IP: 10.10.xxx.24
Netmask: 255.255.255.240
Gateway: 10.10.xxx.17

The local Network IP Address is 192.168.88.1/24

I requested a public IP address from my ISP and they gave me this: 197.243.xxx.248/30

I want to assign this IP address to my windows IIS server so that anyone from outside my lan can access this web server.

What exactly to I have to do?
Please I am sorry, I would like to have simple step by step guide.

Thanking you in advance for your kind assistance.

Shema

Look for Harpin scenario

https://gregsowell.com/?p=4242

https://wiki.mikrotik.com/wiki/Manual:IP/Firewall/NAT