Add a service worker to help installability

build-and-release.bash

@@ -8,6 +8,7 @@ cp \
   public/icon-monochrome.svg \
   public/icon.svg \
   public/manifest.json \
+  public/sw.js \
   build/
 
 VERSION="$(git rev-parse HEAD)"

public/sw.js

@@ -0,0 +1,5 @@
+addEventListener("fetch", (event) => {
+  const url = new URL(event.request.url);
+  console.log("fetch requested", url);
+  event.respondWith(fetch(url));
+});

src/game.ts

@@ -1,3 +1,12 @@
 import { initialiseApp } from "./game/app";
 
 initialiseApp(window).catch((reason) => console.error(reason));
+
+if ("serviceWorker" in navigator) {
+  navigator.serviceWorker.register("sw.js").then(
+    (r) => console.log("Service worker registered", r),
+    (e) => console.log("Service worker failed to register", e),
+  );
+} else {
+  console.log("Service worker not supported");
+}