Update plugins/README

plugins/README.md

@@ -1,13 +1,47 @@
 Plugins are a way to extend the functionality of Selery.
 They are written in D (like Selery) and are compiled with the server.
 
+Official plugins can be found in [selery-plugins](https://github.com/selery-plugins).
+
 ## Structure
 
 Plugins placed in the `plugins` folders are automatically compiled with Selery to create an executable file.
 
+### plugin.toml
+
 Every plugin must contain a `plugin.toml` file that indicates how and when compile the plugin.
 The field are the following:
 - `name`: Indicates the plugin's name. It must be unique on the server.
 - `authors`: An array with the authors of the plugin.
 - `target`: Whether the plugin is executed on the `hub` or on the `node`. Read the main README file for more informations about Selery's model.
 - `main`: The main class of the plugin that must extend `HubPlugin` or `NodePlugin`.
+- `dependencies`: One or more [DUB](https://code.dlang.org) dependencies.
+
+#### Example
+
+```toml
+name = "example"
+authors = ["Kripth"]
+target = "node"
+main = "example.main.Example"
+```
+
+### src
+
+The source code of the plugin is located in the `src` folder. It's a best practice to use a namespace in your plugin, putting the source code in `src/{namespace}`, following the example given in the previous section in `src/example`.
+
+#### Example
+
+```d
+module example.main;
+
+import selery.node.plugin;
+
+class Example : NodePlugin {
+
+	@start onStart() {
+		server.logger.log("Hello from an example plugin!");
+	}
+
+}
+```