docs

docs/scarpet/api/Overview.md

@@ -40,9 +40,13 @@ apps `__on_close()` will execute once per app, and with `'player'` scoped apps,
 ### App config via `__config()` function
 
 If an app defines `__config` method, and that method returns a map, it will be used to apply custom settings 
-for this app. Currently the following options are supported:
+for this app. Currently, the following options are supported:
 
-*   `'scope'`: default scope for global variables for the app, Default is `'player'`, which means that globals and defined 
+* `'strict'` : if `true`, any use of an uninitialized variable will result in program failure. Defaults to `false` if 
+not specified. With `'strict'`you have to assign an initial value to any variable before using it. It is very useful 
+to use this setting for app debugging and for beginner programmers. Explicit initialization is not required for your 
+code to work, but mistakes may result from improper assumptions about initial variable values of `null`.
+* `'scope'`: default scope for global variables for the app, Default is `'player'`, which means that globals and defined 
 functions will be unique for each player so that apps for each player will run in isolation. This is useful in 
 tool-like applications, where behaviour of things is always from a player's perspective. With player scope the initial run 
 of the app creates is initial state: defined functions, global variables, config and event handlers, which is then copied for