Change auto updater to check continuously. Add Double click to tray.

src/main/util/checkForAppUpdates.ts

@@ -0,0 +1,19 @@
+import { autoUpdater } from "electron-updater";
+
+function checkForAppUpdatesContinuously(): void {
+  checkForAppUpdates();
+  setInterval(
+    () => {
+      checkForAppUpdatesContinuously();
+    },
+    1000 * 60 * 30,
+  );
+}
+function checkForAppUpdates(): void {
+  autoUpdater.checkForUpdatesAndNotify({
+    title: "Shop Partner Update",
+    body: "A new version of Shop Partner is available. Click to update.",
+  });
+}
+
+export { checkForAppUpdatesContinuously, checkForAppUpdates };