Use external static files

static/css/fullscreen.min.css

-.xterm.fullscreen{position:fixed;top:0;bottom:0;left:0;right:0;width:auto;height:auto;z-index:255}
-/*# sourceMappingURL=fullscreen.min.css.map */
\ No newline at end of file

static/js/fullscreen.min.js

-!function(e){"object"==typeof exports&&"object"==typeof module?module.exports=e(require("../../xterm")):"function"==typeof define?define(["../../xterm"],e):e(window.Terminal)}(function(e){var t={};return t.toggleFullScreen=function(e,t){var n;n=void 0===t?e.element.classList.contains("fullscreen")?"remove":"add":t?"add":"remove",e.element.classList[n]("fullscreen")},e.prototype.toggleFullscreen=function(e){t.toggleFullScreen(this,e)},t});
\ No newline at end of file

templates/index.html

@@ -4,9 +4,9 @@
     <meta charset="UTF-8">
     <title> WebSSH </title>
     <link href="static/img/favicon.png" rel="icon" type="image/png">
-    <link href="static/css/bootstrap.min.css" rel="stylesheet" type="text/css"/>
-    <link href="static/css/xterm.min.css" rel="stylesheet" type="text/css"/>
-    <link href="static/css/fullscreen.min.css" rel="stylesheet" type="text/css"/>
+    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" type="text/css"/>
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/xterm/2.9.2/xterm.min.css" rel="stylesheet" type="text/css"/>
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/xterm/2.9.2/addons/fullscreen/fullscreen.css" rel="stylesheet" type="text/css"/>
     <style>
       .row {
         margin-top: 20px;
@@ -62,11 +62,11 @@
       <div id="terminal"></div>
     </div>
 
-    <script src="static/js/jquery.min.js"></script>
-    <script src="static/js/popper.min.js"></script>
-    <script src="static/js/bootstrap.min.js"></script>
-    <script src="static/js/xterm.min.js"></script>
-    <script src="static/js/fullscreen.min.js"></script>
+    <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
+    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/xterm/2.9.2/xterm.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/xterm/2.9.2/addons/fullscreen/fullscreen.js"></script>
     <script src="static/js/main.js"></script>
   </body>
 </html>