Disabling autopause means that your Factorio server will continue to run while no players are online. This means when you come back on, your factories will have been running all day, giving you plenty of resources to play with when you login again. Here's how to disable it.
1. Open the File Manager
2. Navigate to /config/
3. Right click server-settings.json
and click Edit
4. Find the line for auto_pause
and set it to false.
5. Save the file and Restart the server.