Setting Up PowerShell in a Docker Windows Container

Hey folks! I'm trying to set up a Docker container that utilizes a Microsoft image and needs PowerShell for running some scripts. I'm hitting a snag because it seems like PowerShell isn't pre-installed in the container environment. Here's what I've tried:

1. Using the Windows Server Core image, which should have PowerShell.
2. Downloading and installing PowerShell Core manually.
3. Trying out different base images.

Here's my current Dockerfile:

```dockerfile
FROM mcr.microsoft.com/windows/servercore:ltsc2022

# Download PowerShell Core
ADD https://github.com/PowerShell/PowerShell/releases/download/v7.4.1/PowerShell-7.4.1-win-x64.zip C:/PowerShell.zip

# Extract PowerShell Core using PowerShell
SHELL ["C:WindowsSystem32WindowsPowerShellv1.0powershell.exe", "-Command"]
RUN Expand-Archive -Path C:PowerShell.zip -DestinationPath C:PowerShell;
Remove-Item -Path C:PowerShell.zip

# Set PowerShell Core as the shell
SHELL ["C:PowerShellpwsh.exe", "-Command"]

# Install MicrosoftTeams module
RUN Install-PackageProvider -Name NuGet -MinimumVersion 2.8.5.201 -Force;
Set-PSRepository -Name PSGallery -InstallationPolicy Trusted;
Install-Module -Name MicrosoftTeams -Force -AllowClobber

# Set working directory
WORKDIR C:/app

# Copy script
COPY service.ps1 .

# Expose port
EXPOSE 8081

# Run script
CMD ["C:PowerShellpwsh.exe", "-File", "C:/app/service.ps1"]
```
Any advice or insights on how to get PowerShell running smoothly in my Docker setup would be awesome!