DockerHelper.ps1

function Get-DockerHost() {
    $versionOutput = $(docker version)
    $dockerHost = $null
    if ($versionOutput -match "linux"){
        $dockerHost = "Linux"
    } else {
        $dockerHost = "Windows"    }
    $msg = "Currently running as a [$dockerHost] host"
    Write-Host $msg -ForegroundColor White -BackgroundColor Blue
    return $dockerHost
}

function Switch-DockerHost() {
    $preSwitch =  Get-DockerHost
    Write-Host "Attempting Switch from $preSwitch"
    Start-Process  "C:\Program Files\Docker\Docker\DockerCli.exe" -Wait -NoNewWindow -ArgumentList "-SwitchDaemon"
    $postSwitch =  Get-DockerHost
    if ($preSwitch -eq $postSwitch) {
        $msg = "Docker host failed to switch! Still set to $preSwitch"
        Write-Host $msg -ForegroundColor Red -BackgroundColor White
        throw $msg
    }
    Write-Host "Switched OK to: [$postSwitch]"
}