Added pyBeamline designer

Author: delas

docs/img/pybeamline-screenshot.jpg

@@ -12,6 +12,14 @@ A complete Jupyter notebook presenting all implemented techniques is available a
   <img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/>
 </a>
 
+#### pyBeamline Designer
+
+To help getting started, you can try the pyBeamline Designer, available at <https://beamline.github.io/pybeamline-designer/>:
+<figure markdown> 
+  ![Screenshot of pyBeamline Designer](img/pybeamline-screenshot.jpg)
+  <figcaption><a href="https://beamline.github.io/pybeamline-designer/" target="_blank">https://beamline.github.io/pybeamline-designer/</a></figcaption>
+</figure>
+
 
 #### Goals and differences with Beamline