Windows specific issues

[1beb]

I had to make some adjustments to the alias commands to get it to work on windows appropriately:

1. Adding winpty to the front when running the command in git-bash
2. Adding a / to the volume, because git-bash was adding C; to the path.

The resulting alias snippet was:

alias zappashell3='winpty docker run -ti -e AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY -e AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID -e AWS_DEFAULT_REGION=$AWS_DEFAULT_REGION -v "/$(pwd):/var/task"  --rm lambci/lambda:build-python3.6 bash'