Wait for internet connection before Windows installation

scripts/Common/Scripts/Operations.ps1

@@ -95,6 +95,14 @@ $null = New-Module {
             & {
                 $initialized = $false;
 
+                # Ping digitalcourage DNS server
+                # https://digitalcourage.de/
+                Write-Host "Waiting for internet connection…";
+
+                while ((Test-Connection -Count 1 5.9.164.112).Status -ne 'Success') {
+                    Start-Sleep 0.1;
+                }
+
                 while (-not $initialized) {
                     if ($IsWindows) {
                         if (-not ((Test-Command "choco") -and (Test-Command "refreshenv"))) {