Fix service worker intercepting cross-origin image fetches, breaking CSP connect-src

src/PowderCoating.Web/wwwroot/sw.js

@@ -5,4 +5,7 @@
 
 self.addEventListener('install', () => self.skipWaiting());
 self.addEventListener('activate', e => e.waitUntil(self.clients.claim()));
-self.addEventListener('fetch', e => e.respondWith(fetch(e.request)));
+self.addEventListener('fetch', e => {
+    if (new URL(e.request.url).origin !== self.location.origin) return;
+    e.respondWith(fetch(e.request));
+});