[docs] Updated readme on how to install plugins

README.md

@@ -36,8 +36,29 @@ Be aware npm might not work.
 
 ### Configure Plugins
 
-You can activate and deactive Plugins in `src/boot/plugins.ts`.
-You have to set the name of the Plugin into `config.loadModules`.
+#### Installing a plugin
+
+Simply add it as a dependency and install it, for example installing the `pricelist`-plugin:
+
+```sh
+yarn add '@flaschengeist/pricelist'
+yarn install
+```
+
+#### Enable / Disable a plugin
+
+After installing a plugin you will have to enable it,
+this is done by adding it to the `plugin.config.js` file.
+For the example above the file should look like:
+
+```js
+module.exports = [
+  // pricelist plugin:
+  '@flaschengeist/pricelist',
+];
+```
+
+Remember to rebuild the project
 
 ### Configure Backend
 
@@ -49,7 +70,7 @@ This access needs to be configured in `src/config.ts'->config.baseURL
 
 ### Build the application
 
-```bash
+```sh
 yarn quasar build
 ```