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Yes! I made it work! Instructions:
Stop all docker containers (to avoid possible interference on port 8080, see later steps) Install Firefox as docker and set it to network type "host" Also set GPhotosSync to network type "host" Assign port 8080 to GPhotos Sync Start both containers Go into unraid terminal and start the sync via: docker exec -it GooglePhotosSync gphotos-sync /storage Copy the URL and paste it into your firefox docker window (click on black dot, paste into text field, then right click within firefox address bar & paste) Sign in to you google account, follow the process and allow the access for the app. It should say "the authentication flow has completed" within firefox and in the terminal window the sync process should start. Wait for the first backup run to finish. (Just to be safe, probably not neccessary.) Afterwards it is probably a good idea to remove the port 8080 from the config again, because it could interfere with other apps as it's a popular port. Happy syncing! (I use the plugin User Scripts to schedule a daily backup of google photos. Just use the same terminal command as above.)