add devcontainer support

.devcontainer/Dockerfile

@@ -0,0 +1,12 @@
+FROM mcr.microsoft.com/devcontainers/base:ubuntu
+# https://learn.microsoft.com/en-us/powershell/scripting/install/install-ubuntu?view=powershell-7.4
+COPY bootstrap.ps1 bootstrap.ps1
+RUN apt-get update \
+    && apt-get install -y wget apt-transport-https software-properties-common \
+    && wget -q https://packages.microsoft.com/config/ubuntu/22.04/packages-microsoft-prod.deb \
+    && dpkg -i packages-microsoft-prod.deb \
+    && rm packages-microsoft-prod.deb \
+    && apt-get update \
+    && apt-get install -y powershell \
+    && pwsh -File bootstrap.ps1
+COPY profile.ps1 /opt/microsoft/powershell/7/profile.ps1

.devcontainer/bootstrap.ps1

@@ -0,0 +1,41 @@
+# https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.psresourceget/install-psresource?view=powershellget-3.x
+# https://devblogs.microsoft.com/powershell/psresourceget-is-generally-available/
+# https://github.com/PowerShell/PSResourceGet
+# https://hub.docker.com/_/microsoft-powershell
+# https://devblogs.microsoft.com/powershell/powershellget-in-powershell-7-4-updates/
+# http://dahlbyk.github.io/posh-git/
+$ErrorActionPreference = 'Stop'
+#$ProgressPreference = 'SilentlyContinue'
+#Set-PSResourceRepository -Name PSGallery -Trusted:$true -Scope AllUsers
+#Install-PSResource -RequiredResourceFile ./.devcontainer/RequiredResourceFile.psd1
+# PSResourceGet is brand new, posh-git installation is giving me trouble. Not sure if it's a mistake on my part
+# or bug with PSResourceGet or posh-git. Leaving it like this for now.
+# Set-PSRepository -Name PSGallery -InstallationPolicy Trusted
+# Install-Module posh-git -Scope CurrentUser -Force
+Install-PSResource -TrustRepository -Scope AllUsers -RequiredResource  @{
+    'Microsoft.PowerShell.PSResourceGet' = @{
+        version    = '1.0.2'
+        repository = 'PSGallery'
+    }
+    'Pester'                             = @{
+        version    = '5.4.0'
+        repository = 'PSGallery'
+    }
+    'InvokeBuild'                        = @{
+        version    = '5.10.2'
+        repository = 'PSGallery'
+    }
+    'PSScriptAnalyzer'                   = @{
+        version    = '1.21.0'
+        repository = 'PSGallery'
+    }
+    'platyPS'                            = @{
+        version    = '0.12.0'
+        repository = 'PSGallery'
+    }
+    'posh-git'                           = @{
+        version    = '1.1.0'
+        repository = 'PSGallery'
+    }
+}
+

.devcontainer/devcontainer.json

@@ -0,0 +1,26 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/powershell
+{
+  "name": "PowerShell",
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  "customizations": {
+    // Configure properties specific to VS Code.
+    "vscode": {
+      // Set *default* container specific settings.json values on container create.
+      "settings": {
+        "terminal.integrated.defaultProfile.linux": "pwsh"
+      },
+      // Add the IDs of extensions you want installed when the container is created.
+      "extensions": [
+        "ms-vscode.powershell",
+        "ryanluker.vscode-coverage-gutters",
+        "DavidAnson.vscode-markdownlint",
+        "eriklynd.json-tools",
+        "redhat.vscode-xml",
+        "ms-azuretools.vscode-docker"
+      ]
+    }
+  }
+}

.devcontainer/profile.ps1

@@ -0,0 +1,40 @@
+Write-Host 'Loading profile...' -ForegroundColor Cyan
+Import-Module posh-git
+# PSReadline
+Set-PSReadLineOption -PredictionSource History
+Set-PSReadLineOption -Colors @{ InlinePrediction = '#2F7004' } #green
+Set-PSReadLineOption -PredictionViewStyle ListView #you may prefer InlineView
+# Custom prompt function
+function prompt {
+    <#
+        .SYNOPSIS
+        Custom prompt function.
+        .EXAMPLE
+        [2022-JUL-30 21:18][..project-starters\aws\aws-backup-automation][main ≡]
+        >>
+    #>
+    $global:promptDateTime = [datetime]::Now
+    $Global:promptDate = $global:promptDateTime.ToString('yyyy-MMM-dd').ToUpper()
+    $Global:promptTime = $global:promptDateTime.ToString('HH:mm')
+    # truncate the current location if too long
+    $currentDirectory = $executionContext.SessionState.Path.CurrentLocation.Path
+    $consoleWidth = [Console]::WindowWidth
+    $maxPath = [int]($consoleWidth / 4.5)
+    if ($currentDirectory.Length -gt $maxPath) {
+        $currentDirectory = '..' + $currentDirectory.SubString($currentDirectory.Length - $maxPath)
+    }
+    $global:promptPath = $currentDirectory
+
+    $InGitRepo = Write-VcsStatus
+    if ($InGitRepo) {
+        Write-Host "[$global:promptDate $global:promptTime]" -ForegroundColor Green -NoNewline
+        Write-Host "[$global:promptPath]" -ForegroundColor Magenta -NoNewline
+        Write-Host $InGitRepo.Trim() -NoNewline
+        "`r`n>>"
+    }
+    else {
+        Write-Host "[$global:promptDate $global:promptTime]" -ForegroundColor Green -NoNewline
+        Write-Host "[$global:promptPath]" -ForegroundColor Magenta -NoNewline
+        "`r`n>>"
+    }
+}

.gitattributes

@@ -0,0 +1,4 @@
+# https://code.visualstudio.com/docs/devcontainers/tips-and-tricks#_resolving-git-line-ending-issues-in-containers-resulting-in-many-modified-files
+* text=auto eol=lf
+*.{cmd,[cC][mM][dD]} text eol=crlf
+*.{bat,[bB][aA][tT]} text eol=crlf

.vscode/extensions.json

@@ -1,9 +1,13 @@
 {
-    // See http://go.microsoft.com/fwlink/?LinkId=827846
-    // for the documentation about the extensions.json format
-    "recommendations": [
-        "ms-vscode.PowerShell",
-        "ryanluker.vscode-coverage-gutters",
-        "DavidAnson.vscode-markdownlint"
-    ]
-}
+  // See http://go.microsoft.com/fwlink/?LinkId=827846
+  // for the documentation about the extensions.json format
+  "recommendations": [
+    "ms-vscode.PowerShell",
+    "ms-vscode-remote.remote-containers",
+    "ryanluker.vscode-coverage-gutters",
+    "DavidAnson.vscode-markdownlint",
+    "eriklynd.json-tools",
+    "redhat.vscode-xml",
+    "ms-azuretools.vscode-docker"
+  ]
+}