Added Readme

README.md

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+# Arma Server Admin
+
+## Requirements
+
+- Node.js, https://nodejs.org/
+- Pre-installed Arma Server
+
+## Supported Games
+
+- arma1
+- arma2
+- arma2oa
+- arma3
+- cwa (does not support linux)
+- ofp
+- ofpresistance
+
+## Config
+
+Key | Description
+--- | --- | ---
+game | Which game server to launch, see above
+path | Folder path to game server
+port | Web port to use
+type | Which kind of server to use, can be 'linux', 'windows' or 'wine'
+
+## How to Use
+
+1. Copy `config.js.example` to `config.js`
+
+2. Change values in `config.js` as described above or in the file
+
+3. Install all dependencies with `npm install`
+
+4. Launch the web UI with `npm start`