Update README.md

README.md

@@ -8,6 +8,10 @@
 
 Real-time application written in React/Redux using AJAX, REST, websockets, React (with hooks) + Redux (@reduxjs/toolkit) + Formik + React Bootstrap.
 
+## Demonstration
+
+![Screenshot](https://private-user-images.githubusercontent.com/24781162/293210632-a64b7f4c-db5f-4cb5-ae32-ff0137c848dd.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.9bupx3RTwwSPLN-gFSVHc8HSWv4cQVZl8GrQAzMXqbo)
+
 ## Description:
 
 This application includes registration, authorization, error page and chat page. Two main channels are available by default and each user can create, rename and delete their own channels. All registered users can exchange messages.