Add @jsx common parser issues in the docs

Update getting-started.md

docs/getting-started.md

@@ -88,6 +88,10 @@ React.renderComponent(
 );
 ```
 
+> Note:
+>
+> The comment parser is very strict right now, in order for it to pick up the `@jsx` modifier, two conditions are required. The `@jsx` comment block must be the first comment on the file. The comment must start with `/**` (`/*` and `//` will not work). If the parser can't find the `@jsx` comment, it will output the file without transforming it.
+
 Update your HTML file as below:
 
 ```html{6,10}