Start to write project development tutorial.

README.md

@@ -3,5 +3,10 @@ Aconit is an asymmetric horror game that is available on Roblox. The project is
 
 [![Discord](https://img.shields.io/discord/1352754862831439974?logo=discord)](https://discord.gg/QpAUUTJm3h)
 
-## Develop Setup
-TODO
+## Developement Setup
+### Node.js and pnpm
+First of all you need to install [node.js](https://pnpm.io/) and [pnpm](https://pnpm.io/).
+Node.js is used for building the project, and pnpm is the package manager.
+### Depencies installation
+For install all depencies simply run ``pnpm install``
+Then you can edit `src` like you want.