Python3.8 Windows Bug: Install pypiwin32 package to enable npipe:// support

[seanpmorgan]

Running armory with python3.8 on windows will throw this error:
docker.errors.DockerException: Install pypiwin32 package to enable npipe:// support

This is a bit cryptic since pypiwin32 is already installed as a dependency in docker library. Since 3.8 there is a new way packages run post_install and this causes an underlying issue when importing pypiwin32.

It can be fixed by running:
python <path-to-python-env>\Scripts\pywin32_postinstall.py -install

Reference:
docker/docker-py#1870
mhammond/pywin32#1431

Alternatively it could be fixed by conda installing pywin32, but we do not currently package armory in conda.

[seanpmorgan]

Closing as there isn't a lot we can do for this and the fix is reported above. Perhaps we should start a FAQ list though.

[CTimmerman]

Afaik that's due to pywin32 not running the post install script with admin rights via the app store. Python 3.7 from python.org does.