Added win start script.

start.ps1

@@ -0,0 +1,60 @@
+# Funktion zur Bereinigung beim Beenden
+function OnExit {
+    Write-Host "`n[DPS] Cleaning up..."
+    if ($backendProcess -and !$backendProcess.HasExited) {
+        $backendProcess.Kill()
+    }
+    if ($frontendProcess -and !$frontendProcess.HasExited) {
+        $frontendProcess.Kill()
+    }
+    Write-Host "[DPS] Cleaned up..."
+
+    # Einen Ordner höher gehen
+    Set-Location (Resolve-Path "..").Path
+    Write-Host "[DPS] Returned to parent directory: $(Get-Location)"
+
+    exit
+}
+
+Write-Host "[DPS] trapped"
+
+# Backend starten
+Set-Location ./00-backend
+$backendOutLog = "../backend_latest.out.log"
+$backendErrLog = "../backend_latest.err.log"
+$backendProcess = Start-Process "java" -ArgumentList "-jar", "target/webshop-0.0.1-SNAPSHOT.jar" `
+    -RedirectStandardOutput $backendOutLog `
+    -RedirectStandardError $backendErrLog `
+    -NoNewWindow -PassThru
+Write-Host "[DPS] Backend started with PID $($backendProcess.Id)"
+
+# Frontend starten (ohne cmd.exe)
+Set-Location ../01-frontend
+$frontendOutLog = "../frontend_latest.out.log"
+$frontendErrLog = "../frontend_latest.err.log"
+
+$frontendProcess = Start-Process "node" `
+    -ArgumentList "node_modules/.bin/react-scripts", "start" `
+    -RedirectStandardOutput $frontendOutLog `
+    -RedirectStandardError $frontendErrLog `
+    -NoNewWindow -PassThru
+
+Write-Host "[DPS] Frontend started with PID $($frontendProcess.Id)"
+
+Write-Host "[DPS] Ctrl+C to stop"
+
+Register-EngineEvent PowerShell.Exiting -Action { OnExit } -SupportEvent
+
+try {
+    while ($true) {
+    Start-Sleep -Seconds 1
+    if ($backendProcess.HasExited -and $frontendProcess.HasExited) {
+        break
+    }
+}
+}
+catch {
+    if ($_.Exception -is [System.Management.Automation.PipelineStoppedException]) {
+        # This block will not execute on CTRL-C
+    }
+}