Foundry pauses simulation when the server is empty by default. Disable that option when production should continue without a connected player.
- Stop the server and open
app.cfgwith the Text Editor. - Set
pause_server_when_empty=false.
- Click Save & Exit and start the server.
This value was verified to persist after a restart. Set it back to true if you do not want time and factory activity to progress while nobody is online.