Serverless Stack

I was looking into tagging the DebugStack the same way as the normal stack tried using key values from a `.env` file. While all worked as expected for my normal stack, the tags were missing in the DebugStack.

The reason for that is the changed run directory during debug stack initialization, which means the environment isn't behaving as I expected.

My workaround was to do an explicit `.env` load from the project directory in such case. Perhaps this could be useful to include in the documentation as well.

Hey <@U03GD41BK2M>, just put in a fix. Will merge after tests pass.

Fixed in `v1.2.0`. You should be able to access env vars in `.env` in debug stack. Let me know if it works.