Thumbnail settings

Make sure that sharp node module is installed (npm install sharp) Make sure that gm node module and GraphicsMagick are installed (npm install sharp)
Thumbnails will be saved in this folder. Write access is required
High quality may be slow. Especially with Jimp.
Icon size (used on maps)
Size of the thumbnails.
The best matching size will be generated. (More size gives better quality, but use storage to store and CPU to render.)
';' separated integers. If size is 200, tha thumbnail will have 200^2 pixels.