fix(multiframe): handling proxies properly (#4693)

Co-authored-by: Bill Wallace <wayfarer3130@gmail.com>
Co-authored-by: Chao Sui <chao.sui@curvebeamai.com>

platform/app/public/config/local_orthanc.js

@@ -8,7 +8,7 @@ window.config = {
   showLoadingIndicator: true,
   showWarningMessageForCrossOrigin: true,
   showCPUFallbackMessage: true,
-  strictZSpacingForVolumeViewport: false,
+  strictZSpacingForVolumeViewport: true,
   // filterQueryParam: false,
   defaultDataSourceName: 'orthanc',
   dataSources: [