add note about level.ts not being editable by hand.

pages/concepts/scripting.mdx

@@ -11,6 +11,7 @@ These templates are setup to work with Dreamlab correctly out of the box, so you
 ## Entrypoints
 
 All scripts must implement three entrypoints for client code, server code, and level data. These are `client.ts`, `server.ts`, and `level.ts` respectively.
+Note that level.ts is automatically generated by the level editor and cannot be edited by hand.
 Client and Server entrypoints must export a single function named `init()` that has a single argument, a reference to the current Dreamlab game context.
 
 Although not strictly required, we recommend defining another shared entrypoint that is called by both client and server `init()` functions that calls