Assigning a public ip address to the device - Orange optical fiber

The addresses are made up, for example.
I have a fiber optic connection from Orange with a pool of 8 public IP addresses: from 88.53.144.176 to 88.53.144.183
In addition, I got the gateway and client address:
205.81.69.53 - address from the ORANGE side
205.81.69.54 - from the client side.
I would like to assign one public address to the router and the other to the computer that is to act as a small HTTP server. I don't know how to go about it. Orange left a modem with a gigabit port made available to us. There is internet access, after connecting the notbook to this port and entering the following values in the connection settings:
IP: 205.81.69.54
mask 255.255.255.252
gateway: 205.81.69.53
DNS server: 8.8.8.8
However, I do not have enough knowledge to understand the assignment of a pool address.
I entered the following values in the connection settings, unfortunately without success.
IP: 88.53.144.178
mask 255.255.255.248
gate: 88.53.144.177
DNS server: 8.8.8.8
You will definitely need a good router to do this, because TP-LINK TL-WR743ND will not handle it.

On TP-Link (or another router) you need to create 2 interfaces: one to Orange and one to your public network. You have to assign an appropriate IP from a given subnet to each of them.
Set Default (0.0.0.0/0) to Orange and check if the routing mechanism is enabled.

Added after 3 [minutes]:

For example, you give your router the address: 88.53.144.177, mask: 255.255.255.248 and on the server then the address: 88.53.144.178, mask: 255.255.255.248 gate 88.53.144.177

The intended goal was achieved on the TP-LINK TL-WR740N router with DD-WRT installed.
In the WAN interface settings I set:
IP: 205.81.69.54
mask: 255.255.255.252
gateway: 205.81.69.53
In the LAN interface settings I set:
IP: 88.53.144.177
mask: 255.255.255.248
After disabling the firewall and switching the device from gateway mode to router mode, computers with an IP address in the range 88.53.144.178-182 are visible to the public.

We purchased the Ubiquiti EdgeRouter 8 pro for the company. So far I have managed to configure eth7 as WAN and eth0 as LAN. When I connect the switch to eth0, all devices connected to it with assigned IP addresses from the address pool are visible to the public. How to configure this router to bypass the switch. I've read that creating bridges programmatically is not very efficient. I wish everything worked like this:
Once you've typed the IP address from the pool you received to each of your network devices and connected them to ports eth0 through eth4, all devices will be publicly available.

It is not possible for someone through the forum to be able to configure your router from practically scratch.
You realize that in the current situation, the setup is like a house with all doors open - after all, you want direct access to servers inside the network. With your level of knowledge about the network, help on the forum will end up with closing the door, the entrance will be through an open window, and everything will be covered with a curtain.
Would you do that at home? You will lose important company data, or your customers will find out that they have just stopped paying back a loan they never took. Hire a good professional, let him do it properly. You should have at least configured: two VRF tables (internal network, access to servers from the public network), firewall, encryption of sensitive data transmission.
Once you've got it done, we'll be happy to check your configuration, fix any bugs, and maybe spot any security holes.

The answer contributed so much to the topic that I have nothing to do with myself now. The link is to be used to expose the stream from the camera installed in the nest of birds that come to Poland for breeding purposes and return home after a few months. There are no other clients or servers in the network where the camera is located, except for the network devices used to transfer the image from the forest to the company's headquarters. The second public address is to be intended for a CCTV recorder, so that the security guard on duty from the security company can see if the activated alarm is false or if someone actually broke into the building. The third address is to be dedicated to the WiFi network that will be behind the NAT. The only crime that can happen on this network is robbing birds of their privacy during love games. Other users who are going to write in the topic, something that does not contribute anything and does not help in any way, please restraint.
Thank you