microsoft/powershell container fails to launch with default settings

[LawrenceHwang]

Steps to reproduce

Pull the latest microsoft/powershell image.
Launch and run a container instance.

yyyyyy\C:\temp
PS:_> docker pull microsoft/powershell
Using default tag: latest
latest: Pulling from microsoft/powershell
Digest: sha256:07c8b527ed5eaed52a67359e093984503dab00f56a7d165cc8b95d0c5df0bc65
Status: Image is up to date for microsoft/powershell:latest
yyyyyy\C:\temp
PS:_> docker images microsoft/powershell
REPOSITORY             TAG                 IMAGE ID            CREATED             SIZE
microsoft/powershell   latest              91e5725258dc        3 days ago          337MB
yyyyyy\C:\temp
PS:_> docker run -it microsoft/powershell
C:\Program Files\Docker\Docker\Resources\bin\docker.exe: Error response from daemon: OCI runtime create failed: container_linux.go:348: starting container process caused "exec: \"pwsh-preview\": executable file not found in $PATH": unknown.
yyyyyy\C:\temp

Works when specifying the pwsh

PS:_> docker run -it microsoft/powershell pwsh
PowerShell 6.1.0
Copyright (c) Microsoft Corporation. All rights reserved.

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

PS />

Expected behavior

Being able to launch the container.

PS:_> docker run -it microsoft/powershell
PowerShell 6.1.0
Copyright (c) Microsoft Corporation. All rights reserved.

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

PS />

Actual behavior

Container failed to launch. It's still pointing to the preview

yunhwa\C:\temp
PS:_> docker run -it microsoft/powershell
C:\Program Files\Docker\Docker\Resources\bin\docker.exe: Error response from daemon: OCI runtime create failed: container_linux.go:348: starting container process caused "exec: \"pwsh-preview\": executable file not found in $PATH": unknown.

Environment data

PS /> $psversiontable

Name                           Value
----                           -----
PSVersion                      6.1.0
PSEdition                      Core
GitCommitId                    6.1.0
OS                             Linux 4.9.93-linuxkit-aufs #1 SMP Wed Jun 6 16:55:56 UTC 2018
Platform                       Unix
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

[LawrenceHwang]

I checked the mcr.microsoft.com/powershell container image and that one works.

[iSazonov]

Please move the issue to PowerShell-Docker repository if it is still actual.