📝 Add a repo structure & tools section to Readme.md

README.md

@@ -4,9 +4,24 @@
 
 Ct.js is a 2D game editor that makes its bet on good documentation, visual tools and smooth workflow.
 
-For general support, ask a question at our [discord server](https://discord.gg/CggbPkb).
+For bugs, feature requests, developing questions, please use [GitHub issues](https://github.com/ct-js/ct-js/issues) so we can better track  them. For general support about making games, ask a question at our [discord server](https://discord.gg/CggbPkb).
 
-# How to set up
+# Repo structure & tools
+
+* `app` — an [NW.js app](https://nwjs.io/), with its configs and static files.
+* `src` — a source folder that compile into `/app` folder at a build time.
+    * `js` — different top-level scripts, including 3rd-party libraries.
+    * `pug` — HTML sources of editor's windows, written in [Pug](https://pugjs.org/).
+    * `riotTags` — components that drive all the logic in ct.js. Written in [Pug](https://pugjs.org/) and [Riot.js v3](https://v3.riotjs.now.sh/).
+    * `styl` — style sheets, written in [Stylus](http://stylus-lang.com/).
+* `branding` — logos and icons belong here.
+* `docs` — official docs of ct.js. Edit them [here](https://github.com/ct-js/docs.ctjs.rocks).
+* `DragonBonesJS` — a dependency for enabling DragonBones' skeletal animation support in ct.js.
+* `SSCD.js` — [a fork](https://github.com/CosmoMyzrailGorynych/SSCD.js) of a collision library for ct.place.
+
+# Forking and installing the dev environment
+
+Building ct.js requires [Node and npm](https://nodejs.org/en/download/) installed on your machine.
 
 ```sh
 git clone [email protected]:CoMiGo/ctjs.git ctjs