update Dockerfile for SMAC installation

[mnguyen0226]

What?

[Describe what was changed and reference relevant issue.]
From Pull Request: #284

This modification related to the issue when install Docker for SMAC: #282

I tried to install Docker to both Python 3.6 and Python 3.7 and figure out that pysc2 needed as well as uninstall enum34 is needed before pip install oxwhiri/smac github repo to prevent enum-Python 3.6 error. Note that there are suggestion for update enum instead of uninstall but this will not work

Why?

[Describe why the change was made.]
To be able to install Docker on Python 3.6, 3.7 correctly

How?

[Describe how the change was made i.e. describe technically what the change does.]
Shown below

Extra

[Any extra information.]
Also, I suggested to update the main Docker repo to up-to-date with the develop one since it does not have uninstall enum and it cause problem in install Docker.

I know that develop is a default git clone but many user might still try to use main branch instead

[KaleabTessera]

Congrats on your first PR @mnguyen0226 . This is much appeciated! :)