Sync Details instructions for Folders confusing

[skwog]

Had to manually edit default.project.json to add ServerStorage and other folders

Rojo Docs sync-details

Any directory on the filesystem will turn into a Folder instance with the same name.

Not true, have to add them to default.project.json by hand.

Recommend add an example explicitly showing a complete default.project.json that corresponds with a 1-to-1 folder mapping for a complete Roblox Studio > New File > Baseplate