updated ref to worker

spec/karma.conf.js

@@ -37,7 +37,7 @@ module.exports = function(config) {
         included: true
       },
       {
-        pattern: './src/util/worker.js',
+        pattern: './worker/worker.js',
         served: true,
         included: false
       },

src/atlasViewer/atlasViewer.workerService.service.ts

@@ -4,7 +4,8 @@ import { filter, take } from "rxjs/operators";
 import { getUuid } from "src/util/fn";
 
 /* telling webpack to pack the worker file */
-import '../util/worker.js'
+import '../../worker/worker.js'
+import '../../worker/worker-plotly.js'
 
 /**
  * export the worker, so that services that does not require dependency injection can import the worker