Update README.md

Author: vntcore

README.md

@@ -23,3 +23,9 @@ node server.js
 > Make sure the HTML files are served from a server (hosted) and not opened directly as local files, because the login stores the pending login request ID in cookies, which won’t work if you open the file locally.
 
 I hope this helps you learn how a robust login and signup system works. Have fun experimenting and modifying my code by adding extra features, for example, a token-based system after the user logs in.
+
+### Sign up phase
+![tuto-gif](signup.gif)
+
+### Log in phase
+![tuto-gif](login.gif)