Add a demo video

README.md

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+# Minecraft Realms Emulator
+
+This is a custom implementation of a Minecraft Realms server for Java Edition,
+written in C#.
+
+# Requirements
+
+- .NET SDK (version 8.0 or higher)
+- Minecraft Java Edition
+- PostgreSQL (for database support)
+- Docker (for `REALMS` mode to work)
+
+# Installation
+
+Clone the repository:
+
+```sh
+git clone https://github.com/CyberL1/Minecraft-Realms-Emulator.git 
+cd Minecraft-Realms-Emulator/Minecraft-Realms-Emulator
+```
+
+Configure the server:
+
+Create a `.env` file:
+
+```
+CONNECTION_STRING="User Id=postgres;Password=password;Server=db;Port=5432;Database=Minecraft-Realms-Emulator;"
+ADMIN_KEY="[RANDOMLY GENERATED KEY]"
+```
+
+Build the server:
+
+```sh
+dotnet build
+```
+
+Run the server:
+
+```sh
+dotnet run
+```
+
+# Demo
+
+[![Demo](https://img.youtube.com/vi/5pHPsKQhEjI/0.jpg)](https://www.youtu.be/5pHPsKQhEjI)