Progressive Web App - Move Permanently 301

A simple example showing how a PWA can be permanently redirected (code 301) to a new URL. app1 represents the original service. app2 represents a new service provided by a different domain. Our goal: New users as well as users who have installed the PWA should be redirected to app2.

Procedure

1. Run docker-compose.yml. Two services, app1 and app2, start on :8090 and :8091, respectively.
2. Open localhost:8090.
3. Stop the services, reload the website. Thanks to the service worker, the page should still work.
4. In the docker-compose.yml, replace the nginx site configuration. Thus, comment the line starting with - "./app1/default.conf... and comment out the line after it.
5. Start the services again.
6. Open localhost:8090 in a private session -> it should instantly redirect to localhost:8091.
7. Reload localhost:8090 in your normal session -> it should also redirect to localhost:8091.