Small Improvements to Frontend Dev Onboarding

I was really pleasantly surprised to see that I could change the frontend code against a server running elsewhere! Kudos for that.

There were two things that caused slight hiccups:

1. The port of the URL displayed after running npm run serve was wrong. This changes port 8000 to 8080 so it's consistent.
2. The server crashed the first time I started it and complained about missing translations. Instead of manually having to generate them, the command now checks if the folder exists and generates the translations if needed.

Hope this is helpful, happy new year!