Add Set up a custom server

Set-up-a-custom-server.md

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+# Impostor
+
+Impostor is a C# server implementation for Among Us.
+
+You can run it on a laptop, a Raspberry Pi, a VPS....
+
+## Setup
+
+1. Download the latest build from the [releases](https://github.com/Impostor/Impostor). Use the x64 build for AMD/Intel processors, ARM/ARM64 for a Raspberry Pi, an ARM VPS or any ARM machine.
+2. Extract the .zip file on a folder.
+3. Open the config.json file. Modify the ``PublicIp`` field by your public IP adress. If you want to use host-only mods (Ex: EndlessHostRoles, TOHO...), modify the ``AllowHostAuthority`` field and put "true".
+4. Install [.NET 8.0](https://dotnet.microsoft.com/en-us/download/dotnet/8.0) Runtime on your machine.
+
+Using Debian? You can follow this tutorial from Microsoft: https://learn.microsoft.com/en-us/dotnet/core/install/linux-debian?tabs=dotnet10
+
+5. Run Impostor.Server
+6. You now have your own private server!