OHIF-159 Fix wado-proxy issues

Packages/ohif-wadoproxy/server/initialize.js

@@ -1,7 +1,9 @@
-Settings = Object.assign((Meteor.settings && Meteor.settings.proxy) ? Meteor.settings.proxy : {}, {
-    uri : "/__wado_proxy",
+import { OHIF } from 'meteor/ohif:core';
+
+Settings = Object.assign({
+    uri : OHIF.utils.absoluteUrl("/__wado_proxy"),
     enabled: true
-})
+}, (Meteor.settings && Meteor.settings.proxy) ? Meteor.settings.proxy : {});
 
 http = require("http");
 url = require("url");