Update README.md

README.md

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-# gemify
-Turn your Steam items into gems.
+# Gemify
+Gemify is a CLI (Command Line Interface) application that allows you to easily convert your Steam items to Gems.
+
+## Install
+Gemify is built on top of [Node.JS] (https://nodejs.org/), make sure to install it before installing Gemify.
+
+### Windows
+To install Gemify on Windows you need to run the Install executable. Once installation has completed this window will automatically close. You can now run the Gemify executable to start using Gemify.
+
+### Other Operating Systems
+To install Gemify on operating systems other than Windows you will need to use the Terminal. Open your terminal and navigate to the folder in which you put the Gemify files. You can then run the `npm install` command to install Gemify. To use Gemify, use the command `node index`
+
+#### Contact
+If you need any help, feel free to contact me by [email](mailto:[email protected]) or on [Steam](https://steamcommunity.com/profiles/76561198340449674)