Fetch version of the confluence Server

Get-ConfluenceVersion.ps1

function Get-ConfluenceVersion {
    [CmdletBinding()]
    param (
        # Server
        [Parameter(Mandatory = $true)]
        [string] $ServerUrl
    )
    
    begin {
        $response = Invoke-RESTMethod -Uri $ServerUrl

        $meta = ($response | Select-string -Pattern 'meta name="ajs-version-number" content="(.+)"' -AllMatches).Matches.value
        
        $metaVersion = $meta -match 'content="(?<version>[\d\.]+)"'
        
        [version]$matches["version"]
    }
}