added app route for about.html

webui.py

@@ -16,6 +16,10 @@ def hello():
 def welcome():
 	return render_template("welcome.html")
 
+@app.route("/about")
+def about():
+	return render_template("about.html")
+
 @app.route("/login")
 def show_login_page():
 	return render_template("login.html", signup = False)