[DNM] Add windowsservercore with MSI installers

[nschonni]

This doesn't replace the other Windows PRs like #720, just showing an alternate using the MSI installers.

EX:

1. docker build .\8\windowsservercore\ -t nodejs:windowsservercore-8
2. docker run --rm -it nodejs:windowsservercore-8 powershell

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

PS C:\> yarn --version
1.6.0
PS C:\> node --verson
C:\Program Files\nodejs\node.exe: bad option: --verson
PS C:\> node --version
v8.11.3
PS C:\> npm --version
5.6.0
PS C:\> whoami
user manager\containeradministrator

Pros:

• The GPG part isn't needed
• The MSIs setup perf counters and the Path automagially

Cons:

• This method won't work for nanoserver. I've opened up APPX packaged version for Windows Server 2016 build#1413 to see if an APPX package can be built to support that.

/cc @LaurentGoderre @StefanScherer