re-add instructions for settings.yml tweaks

README.md

@@ -8,6 +8,28 @@ This plugins adds a button in the options dropdown menu to start a Tour to guide
 
 You can configure some "Learn More" links that are shown in some steps (screenshare, whiteboard, general) in the settings of the plugin, see example below.
 
+## Running the Plugin From Source Code
+
+1. Start the development server:
+
+```bash
+npm install
+npm start
+```
+
+2. Add this to the `settings.yml` of the BBB HTML5-client:
+```yaml
+public:
+  plugins:
+    - name: TourPlugin
+      url: <<PLUGIN_URL>>
+      settings:
+        url:
+          screenshare: "https://some.url.with.more.information"
+          whiteboard: "https://some.url.with.more.information"
+          general: "https://some.url.with.more.information"
+```
+
 ## Building the Plugin
 
 To build the plugin for production use, follow these steps: