Remove remote urls, use own server

corsscripts/sortable.css

-@import url("https://cdn.jsdelivr.net/npm/bootstrap@5.3.1/dist/css/bootstrap.min.css");
-@import url("https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css");
+@import url("https://static.wp.hs-hannover.de/assets/css/bootstrap.min.css");
+@import url("https://static.wp.hs-hannover.de/assets/css/font-awesome.min.css");
 @import url("../styles.css");
 
 body {

corsscripts/sortable.min.css

-@import url("https://cdn.jsdelivr.net/npm/bootstrap@5.3.1/dist/css/bootstrap.min.css");@import url("https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css");@import url("../styles.css");body{background-color:inherit;}
+@import url("https://static.wp.hs-hannover.de/assets/css/bootstrap.min.css");@import url("https://static.wp.hs-hannover.de/assets/css/font-awesome.min.css");@import url("../styles.css");body{background-color:inherit;}
 button{margin:2px 3px;}.container{overflow:auto;}#usedList:empty{height:50px;background-color:floralwhite;border:2px solid rgb(155,199,206);}#usedList>li{background-color:rgb(176,221,228);border-left:thick solid rgb(155,199,206);float:left;}#availableList>li{background-color:rgb(243,189,88);float:left;}#availableList:empty{height:50px;background-color:lightpink;}#availableList>.sortable-chosen{box-shadow:0px 0px 0px 3px rgb(226,150,9)inset;}#usedList>.sortable-chosen{box-shadow:0px 0px 0px 3px rgb(155,199,206)inset;}#usedList>.header{background-color:inherit;text-align:center;border-bottom:thick solid;}#availableList>.header{background-color:inherit;text-align:center;border-bottom:thick solid rgb(196,131,10);}.parsons-button{display:inline-flex;align-items:center;padding:0.5rem 0.75rem;margin:2px 2px;font-size:25px;line-height:1.5;text-align:center;white-space:nowrap;vertical-align:middle;user-select:none;cursor:pointer;background-color:#6c757d;border:1px solid#6c757d;color:#ffffff;border-radius:0.35rem;transition:color 0.15s ease-in-out,background-color 0.15s ease-in-out,border-color 0.15s ease-in-out,box-shadow 0.15s ease-in-out;}.parsons-button:hover{background-color:#5a6268;border-color:#545b62;color:#ffffff;}.parsons-bin{width:33%;cursor:default;}.bin-icon{margin-right:0.75rem;}.drop-zone{vertical-align:middle;display:inline-flex;flex:1;border:2px dashed#6c757d;border-radius:0.25rem;background-color:lightgray;align-self:stretch;}.drop-zone>li{font-size:0.75rem;background-color:lightcoral;max-height:100%;max-width:100%;text-align:left;flex:1;box-shadow:0px 0px 0px 2px rgb(167,89,89)inset;}.sortable-warning{float:right;font-size:0.8em;margin:-0.3em-0.3em;}
\ No newline at end of file

vle_specific.php

@@ -190,7 +190,9 @@ function stack_cors_link(string $filename): string {
  */
 function stack_get_mathjax_url(): string {
     // TODO: figure out how to support VLE local with CORS.
-    return 'https://cdn.jsdelivr.net/npm/mathjax@2.7.9/MathJax.js?config=TeX-AMS-MML_HTMLorMML';
+    //return 'https://cdn.jsdelivr.net/npm/mathjax@2.7.9/MathJax.js?config=TeX-AMS-MML_HTMLorMML';
+    // request mathjax from own server
+    return 'https://static.wp.hs-hannover.de/mathjax/MathJax.js?config=TeX-AMS-MML_HTMLorMML';
 }
 
 /*