Microsoft Docker Powershell Core Madness

> docker run -it --rm --user ContainerAdministrator --dns 9.9.9.9 mcr.microsoft.com/powershell:6.1.1-nanoserver-1809
where 1809 matches host edition (otherwise get 'helpful' error: manifest unknown: manifest unknown.) 

> docker pull mcr.microsoft.com/powershell:latest
may work better

C:\Users\Cador PS>docker pull mcr.microsoft.com/powershell:latest
latest: Pulling from powershell
7ddbc47eeb70: Pull complete
c1bbdc448b72: Pull complete
8c3b70e39044: Pull complete
45d437916d57: Pull complete
39cbf7b9915e: Pull complete
3e668c5f0e83: Pull complete
Digest: sha256:6f2c050951582ea12da7dbbeccb1fd06a623cb877448196d5d7e80b1abc25fba
Status: Downloaded newer image for mcr.microsoft.com/powershell:latest
mcr.microsoft.com/powershell:latest
C:\Users\Cador PS>docker run -it --rm --user ContainerAdministrator --dns 9.9.9.9 mcr.microsoft.com/powershell:latest
PowerShell 6.2.3
Copyright (c) Microsoft Corporation. All rights reserved.

https://aka.ms/pscore6-docs
Type 'help' to get help.

PS /> echo $PSVersionTable

Name                           Value
----                           -----
PSVersion                      6.2.3
PSEdition                      Core
GitCommitId                    6.2.3
OS                             Linux 4.19.27-linuxkit #1 SMP Sun Mar 10 18:51:44 UTC 2019
Platform                       Unix
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

PS /> test-connection -ResolveDestination www.microsoft.com
Pinging e13678.dspb.akamaiedge.net [104.80.22.51] with 32 bytes of data:
Reply from 104.80.22.51: bytes=32 time=12ms TTL=128
Reply from 104.80.22.51: bytes=32 time=11ms TTL=128
Reply from 104.80.22.51: bytes=32 time=10ms TTL=128
Reply from 104.80.22.51: bytes=32 time=11ms TTL=128
Ping complete.

Source       Destination                Replies
------       -----------                -------
d9a5d7311ad6 e13678.dspb.akamaiedge.net {System.Net.NetworkInformation.PingReply, System.Net.NetworkInformation.PingRe…