Some linting and further documenting

README.md

@@ -26,6 +26,11 @@ If you are deploying in a subdirectory, add it to `publicPath` in vue.config.js,
 npm run build
 ```
 
+```
+npx prettier --write ./sw_scripts/
+```
+to make sure the service worker scripts are in proper form
+
 ... then copy the contents of the `sw_scripts` folder to the `dist` folder - except additional_scripts.js.