readme updates

README.md

@@ -2,6 +2,24 @@
 
 This tutorial aimed to show how you may break your bot parts into different modules and run it easily change the 
 
+## Introduction before introduction :)
+
+This project uses [Gradle](https://gradle.org) build tool and there is high chance to see gradle in the other kotlin configuration.
+Each part will be included in separated gradle module as [Plugin](https://github.com/InsanusMokrassar/PlaguBot/blob/master/plugin/src/main/kotlin/dev/inmo/plagubot/Plugin.kt) from [PlaguBot](https://github.com/InsanusMokrassar/PlaguBot).
+Of course, that does not mean that all the logic of each plugin will be only in one file, but I will try hard to not forget mention it.
+
+Basically, PlaguBot uses [this template of config](https://github.com/InsanusMokrassar/PlaguBot/blob/master/template.config.json), but in each (or almost each) part of this tutorial will be shown how to add your own fields to this config and deserialize it.
+There are several important things about plugins:
+
+* Plugin realization (excepting abstract ones, of course) must have empty constructor for creating an instance or be an object (like `object MyPlugin : Plugin`)
+* Plugin have two sections - for `DI` setup (lets name it config stage) and bot setup (plelaunch stage)
+* Plugin have access predefined things from `koin` in `setupBotPlugin` or received in modules scopes:
+  * `PlaguBot` config
+  * `PlaguBot` plugins
+  * Database and its config
+  * Default `Json` format (can be accessed as `koin.get<Json>()`)
+  * The `PlaguBot` itself
+
 ## How to launch
 
 First, you need to change bot token inside of [config.json](config.json). The other parts should be described in the readmes of the modules with these parts.