fix(config): Stop crashes if window.config is not defined when script-tag viewer is loaded

cypress/support/script-tag/index.html

@@ -25,12 +25,11 @@
 
   <div id="root"></div>
 
+  <script src="/dist/index.umd.js" crossorigin></script>
   <script>
     window.config = {
       // default: '/'
       routerBasename: '/',
-      // default: ''
-      relativeWebWorkerScriptsPath: '',
       servers: {
         dicomWeb: [
           {
@@ -45,10 +44,7 @@
         ],
       },
     }
-  </script>
 
-  <script src="/dist/index.umd.js" crossorigin></script>
-  <script>
     window.OHIFStandaloneViewer.installViewer(window.config);
   </script>
 </body>

src/App.js

@@ -72,7 +72,7 @@ extensionManager.registerExtensions([
 ]);
 
 // Must run after extension commands are registered
-if (window.config.hotkeys) {
+if (window.config && window.config.hotkeys) {
   hotkeysManager.setHotkeys(window.config.hotkeys, true);
 }
 

src/OHIFStandaloneViewer.js

@@ -136,7 +136,7 @@ class OHIFStandaloneViewer extends Component {
     ];
 
     const showStudyList =
-      window.config.showStudyList !== undefined
+      window.config && window.config.showStudyList !== undefined
         ? window.config.showStudyList
         : true;
     if (showStudyList) {