docs: Add demo gif on how to add toolbar actions via ZMI

DEVELOP.md

@@ -16,12 +16,14 @@
 
 1. Go to http://localhost:3000
 
-1.  Happy hacking!
+1. Initialize git hooks
 
     ```Bash
-    cd src/addons/volto-toolbar-actions/
+    yarn prepare
     ```
 
+1. Happy hacking!
+
 ### Or add @eeacms/volto-toolbar-actions to your Volto project
 
 Before starting make sure your development environment is properly set. See [Volto Developer Documentation](https://docs.voltocms.com/getting-started/install/)
@@ -48,18 +50,15 @@ Before starting make sure your development environment is properly set. See [Vol
 
 1.  Install
 
-        yarn develop
+        make develop
         yarn
 
 1.  Start backend
 
-        docker pull plone
-        docker run -d --name plone -p 8080:8080 -e SITE=Plone -e PROFILES="profile-plone.restapi:blocks" plone
+        docker run --pull always -it --rm --name plone -p 8080:8080 -e SITE=Plone plone/plone-backend
 
     ...wait for backend to setup and start - `Ready to handle requests`:
 
-        docker logs -f plone
-
     ...you can also check http://localhost:8080/Plone
 
 1.  Start frontend

README.md

@@ -19,7 +19,11 @@
 
 ## Features
 
-![Toolbar Actions](https://github.com/eea/volto-toolbar-actions/raw/develop/docs/toolbar-actions.png)
+![Toolbar Actions](https://github.com/eea/volto-toolbar-actions/raw/master/docs/toolbar-actions.png)
+
+### Demo - How to add a toolbar action via ZMI
+
+![Toolbar Actions](https://github.com/eea/volto-toolbar-actions/raw/master/docs/toolbar-actions.gif)
 
 ## Getting started