move serviceworker registration to separate module

src/swmodule.js

@@ -0,0 +1,14 @@
+export const register = () => {
+	if ('serviceWorker' in navigator) {
+		window.addEventListener('load', () => {
+			navigator.serviceWorker.register('/sw.js').then(
+				(registration) => {
+					// console.log(`sw successful with scope: ${registration.scope}`);
+				},
+				(err) => {
+					// console.log(`sw failed: ${err}`);
+				}
+			);
+		});
+	}
+};