First you need to download all required files:

1. Download Server Files. Path to server must be only with english characters.
2. Download Server Launcher
3. Register your server here
4. Run ZServer.exe
5. In ZServer add server exe and set params to this:
-zlogin ChangeMe -zpass ChangeMe -GamePort 25200 -RemoteAdminPort 0.0.0.0:48000 -Country EU -Region EU -serverInstancePath "ZEXEPATHZ/Instance" -PingSite ams
zlogin and zpass - from step 3.

Basic Settings / How to set up your own server?
In the folder, go to the server in the Scripts folder and edit Win32Game.cfg
-BFServer.GameSize 32 // specify the size of your server here
-Network.MaxClientCount 32 // same here

In the server folder go to Instance/Admin.
Edit Startup.txt and replace all ChangeMe to something useful.
Also in the Admin folder:
BanList.txt - Players you ban in procon will be saved here
MapList.txt - Map rotation list
ReservedSlotsList.txt - List of nicknames to reserve slots in server

Use Procon Frostbite to configure your server.

Servers with XP modifier above 2 will be banned with owner.