add Logout button to header

views/profile.pug

@@ -92,4 +92,4 @@ html(lang="en")
     // Bootstrap
     script(src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous")
     // M4_LAB
-    script(src="https://transfer.hft-stuttgart.de/js/headfoot.js")
\ No newline at end of file
+    script(src="/js/headfootLogout.js")
\ No newline at end of file

views/security.pug

@@ -74,7 +74,7 @@ html(lang="en")
     // M4_LAB
     script(src="/js/security.js")
     script(src="/js/generalFunction.js")
-    script(src="https://transfer.hft-stuttgart.de/js/headfoot.js")
+    script(src="/js/headfootLogout.js")
     script.
         // check input fields
         'use strict';

views/services.pug

@@ -67,7 +67,7 @@ html(lang="en")
     // Bootstrap
     script(src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous")
     // M4_LAB
-    script(src="https://transfer.hft-stuttgart.de/js/headfoot.js")
+    script(src="/js/headfootLogout.js")
     script.
         function subscribe() {
             alert("To be implemented: Send a request to join/participate/have access to the page of the requested service")