function Get-ValidHotfixServerTiers {
    <#
.SYNOPSIS
    Returns an array of valid Server Tiers(types) to be used in Hotfix manifests as a target
#>
    [CmdletBinding()]
    [OutputType([string[]])]
    param()
    [array]$validHotfixServerTiers = @(
        "APP",
        "WEB",
        "ALL"
    )
    return $validHotfixServerTiers
}