1. Open the File Manager
2. Navigate to /server/docker/cfg/
3. Create a file called server.cfg
4. Right click the file and select Edit
5. Add this line with a link to your image. You can use a website like this to a get a URL to your image. Your image needs to be 512x256 or 1024x512 and in either .jpg
or .png
format.
server.headerimage: "https://myimagelinkhere.png"
6. Restart your server and the banner will appear in game