$path = "test"
$filter = "*.config"

#To support both absolute and relative paths..
$pathitem = Get-Item -Path $path

#If sourcepath exists
if($pathitem) {
    #Get name for tempfolder
    $tempdir = Join-Path $env:temp "CompressArchiveTemp"

    #Create temp-folder
    New-Item -Path $tempdir -ItemType Directory -Force | Out-Null

    #Copy files
    Copy-Item -Path $pathitem.FullName -Destination $tempdir -Filter $filter -Recurse

    #Get items inside "rootfolder" to avoid that the rootfolde "test" is included.
    $sources = Get-ChildItem -Path (Join-Path $tempdir $pathitem.Name) | Select-Object -ExpandProperty FullName

    #Create zip from tempfolder
    Compress-Archive -Path $sources -DestinationPath config-files.zip

    #Remove temp-folder
    Remove-Item -Path $tempdir -Force -Recurse
}