Add a little example to readme for why allowJs is required

[pitoniak32]

I was fighting an error and couldn't find anyone seeing the same issue as me anywhere. It turned out I had allowJs true in my tsconfig.

The error:

TypeError [ERR_INVALID_URL_SCHEME]: The URL must be of scheme file
...

This occurred when using the local-action but not when running the built JavaScript.

My proposal is add a section to "TsConfig Requirements". I would be more than happy to make a PR if it's welcomed!

Troubleshooting

Possible errors that can arise if these settings are incorrect

• ...

[ncalteen]

Yeah I'm ashamed to say how long it took me to figure that problem out too...

I did add a small snippet here, however if you'd like to expand on that a PR is more than welcome!

[pitoniak32]

crated a pr adding the extra details!