Disable settings with disabled passwords/accounts

[dbruggner]

I'm using pigallery for a fotobox. People can take a photo from themselves and afterwards they can login to a wifi hotspot and are redirected to the pigallery website to download their picture. Currently I have to ways to setup pigallery, with a password protected guest account or without accounts. The first approach has the drawback of the requirement of the login credentials and with the second approach the users has access to the settings panel.

I would like to have a command line parameter to disable the settings panel like 'npm start -- --disable-settings=true'.