When you play on your Factorio world, the server autosaves progress. When the server is restarted, you need to make sure the server loads the autosave file and not the original world.
Here's how to switch your server to use autosaves:
- Login to the control panel at https://control.low.ms
- Click Commandline Manager
- Click Selected on the row called Latest Save
- Your server is now on the last autosave. It will now always load the latest autosave.
If you want to create a new world sometime in the future, check out the
How to create a new world guide.
Order your Factorio server now here