chore: Add Dockerfile and VS Code task for running pester tests in a container

Co-authored-by: Copilot <copilot@github.com>

Author: deadlydog

.vscode/tasks.json

@@ -140,6 +140,51 @@
 			"problemMatcher": [
 				"$func-powershell-watch"
 			]
+		},
+		{
+			"label": "Build Docker image for Pester tests",
+			"type": "shell",
+			"options": {
+				"shell": {
+					"executable": "pwsh",
+					"args": [
+						"-NoProfile",
+						"-Command"
+					]
+				}
+			},
+			"command": "docker build -t pester-tests:latest .",
+			"group": "build",
+			"presentation": {
+				"reveal": "always",
+				"panel": "dedicated",
+				"clear": true
+			},
+			"problemMatcher": []
+		},
+		{
+			"label": "Run Pester tests in Docker",
+			"type": "shell",
+			"options": {
+				"shell": {
+					"executable": "pwsh",
+					"args": [
+						"-NoProfile",
+						"-Command"
+					]
+				}
+			},
+			"command": "docker run --rm -e AZURE_ARTIFACTS_TESTING_FEED_PAT=$Env:AZURE_ARTIFACTS_TESTING_FEED_PAT pester-tests:latest",
+			"dependsOn": [
+				"Build Docker image for Pester tests"
+			],
+			"group": "test",
+			"presentation": {
+				"reveal": "always",
+				"panel": "dedicated",
+				"clear": true
+			},
+			"problemMatcher": []
 		}
 	]
 }

Dockerfile

@@ -0,0 +1,28 @@
+# Use .NET 10 runtime as base image
+FROM mcr.microsoft.com/dotnet/sdk:10.0
+
+# Install PowerShell
+RUN apt-get update && \
+    apt-get install -y curl gnupg apt-transport-https && \
+    curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add - && \
+    echo "deb [arch=amd64] https://packages.microsoft.com/repos/microsoft-debian-bullseye-prod bullseye main" > /etc/apt/sources.list.d/microsoft.list && \
+    apt-get update && \
+    apt-get install -y powershell && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Create working directory
+WORKDIR /workspace
+
+# Copy the module and tests into the container
+COPY . .
+
+# Set PowerShell as the default shell
+SHELL ["pwsh", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+
+# Install required PowerShell modules
+RUN Install-Module -Name PowerShellGet -RequiredVersion 2.2.5 -Force && \
+    Install-Module -Name Pester -Force
+
+# Run Pester tests
+ENTRYPOINT ["pwsh", "-NoProfile", "-Command", "Invoke-Pester -Configuration (New-PesterConfiguration @{ Output = @{ Verbosity = 'Detailed' }})"]