Fix css file path in viewer

Author: daniellrgn

static/ips/index.html

@@ -23,7 +23,7 @@
   <script src="https://unpkg.com/[email protected]/dist/squirrelly.min.js"></script>
   <script src="https://mozilla.github.io/pdf.js/build/pdf.mjs" type="module"></script>
   <!-- IPS Specific Custom CSS-->
-  <link rel="stylesheet" href="./assets/css/custom.css">
+  <link rel="stylesheet" href="/ips/assets/css/custom.css">
 
   <!-- IPS Rendering -->
   <script type="module" src="/ips/assets/js/renderIPS.js"></script>