Add note about naming the file main.swift. (#283)

camdenfullmer · web-flow · commit 58664bd23bda · 2023-01-17T16:41:36.000-08:00
diff --git a/readme.md b/readme.md
@@ -37,7 +37,7 @@ First, create a SwiftPM project and pull Swift AWS Lambda Runtime as dependency
  )
  ```
 
-Next, create a `MyLambda.swift` and implement your Lambda.
+Next, create a `MyLambda.swift` and implement your Lambda. Note that the file can not be named `main.swift` or you will encounter the following error: `'main' attribute cannot be used in a module that contains top-level code`.
 
 ### Using async function
 

Original file line number	Diff line number	Diff line change
`@@ -37,7 +37,7 @@ First, create a SwiftPM project and pull Swift AWS Lambda Runtime as dependency`
`37`	`37`	`)`
`38`	`38`	```
`39`	`39`
`40`		-Next, create a `MyLambda.swift` and implement your Lambda.
	`40`	+Next, create a `MyLambda.swift` and implement your Lambda. Note that the file can not be named `main.swift` or you will encounter the following error: `'main' attribute cannot be used in a module that contains top-level code`.
`41`	`41`
`42`	`42`	`### Using async function`
`43`	`43`