Update README.md

README.md

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 # OpenTabletop
+[![NODE.JS DEPENDENCIES](https://david-dm.org/Rundik/OpenTabletop.svg)](https://david-dm.org/Rundik/OpenTabletop)
+[![Github All Releases](https://img.shields.io/github/downloads/Rundik/OpenTabletop/total.svg)](https://github.com/Rundik/OpenTabletop)
+[![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-blue.svg)](http://www.gnu.org/licenses/gpl-3.0)
+
 Browser-based online project in which you can play any card games with your friends
+
+## Instalation
+First, you’ll need Node.js [latest version](https://nodejs.org/en/) with npm.
+
+1. Download the latest release of [OpenTabletop](https://github.com/Rundik/OpenTabletop/)
+  * Download and unzip
+  * If you have git installed ``` git clone git://github.com/Rundik/OpenTabletop.git ```
+2. `npm install`
+3. Start OpenTabletop `npm start `
+4. Go to `http://localhost`
+  * You can change the port in `server.js`
+5. Enjoy
+
+## Security Vulnerabilities
+It is not secure at all. If you build it on your own server, make sure nobody another have access to it.
+
+## Screenshots
+![screenshot_1](https://cloud.githubusercontent.com/assets/13032812/21782175/cc118a12-d6b2-11e6-9062-a45a7ca2fe88.png)
+![screenshot_2](https://cloud.githubusercontent.com/assets/13032812/21782174/cc107546-d6b2-11e6-8aed-cde9c9a888d5.png)