[FEAT] Enable PWA functionality

breccia_mapper/static/js/serviceworker.js

@@ -0,0 +1,24 @@
+var staticCacheName = "djangopwa-v1";
+
+self.addEventListener("install", function (event) {
+  event.waitUntil(
+    caches.open(staticCacheName).then(function (cache) {
+      return cache.addAll([""]);
+    })
+  );
+});
+
+self.addEventListener("fetch", function (event) {
+  var requestUrl = new URL(event.request.url);
+  if (requestUrl.origin === location.origin) {
+    if (requestUrl.pathname === "/") {
+      event.respondWith(caches.match(""));
+      return;
+    }
+  }
+  event.respondWith(
+    caches.match(event.request).then(function (response) {
+      return response || fetch(event.request);
+    })
+  );
+});