feat: service worker (#1045)

* init

* use workbox-window

* Try to accomodate SW hosted at non root url

* v5 updated namespaces

* Test w/ no prompt

* add icons to manifest

* remove scope for now

* add icon tile information to entrypoint

* See if we can skirt by without a duplicate install

* shift client claims to skip waiting message

* Remove prepended slash

* comment out cache handler for now

* Simplify service-worker to skip waiting and install when a new worker is detected

* Use generated icons

* Update rollbar config

platform/viewer/public/assets/browserconfig.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square70x70logo src="/assets/mstile-70x70.png"/>
+            <square150x150logo src="/assets/mstile-150x150.png"/>
+            <wide310x150logo src="/assets/mstile-310x150.png"/>
+            <square310x310logo src="/assets/mstile-310x310.png"/>
+            <TileColor>#fff</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>