feat: Add SSH-Key support for secure deployment authentication

- upload.sh: Conditional SSH-Key vs. password authentication
- Automatic detection of SSH-Keys via FTP_SSH_KEY variable
- CloudPanel-compatible SSH-Key integration
- .env.upload.example: Added SSH-Key documentation
- Secure SFTP uploads without passwords in code

deployment/scripts/.env.upload.example

@@ -16,6 +16,10 @@ FTP_PATH="/htdocs"
 # SSH/SFTP Port (Standard: 22)
 FTP_PORT="22"
 
+# SSH-Key Authentifizierung (Optional, für SSH-Key-only Server)
+# Falls gesetzt, wird SSH-Key statt Passwort verwendet
+# FTP_SSH_KEY="$HOME/.ssh/id_rsa"
+
 # Beispiele für verschiedene Provider:
 # Strato:     FTP_HOST="ftp.strato.de"     FTP_PATH="/htdocs"
 # 1&1:        FTP_HOST="ftp.1und1.de"      FTP_PATH="/htdocs"  

deployment/scripts/upload.sh

@@ -35,6 +35,15 @@ echo "   Host: $FTP_HOST"
 echo "   User: $FTP_USER"
 echo "   Port: $FTP_PORT"
 echo "   Path: $FTP_PATH"
+
+# SSH-Key Authentifizierung prüfen
+if [ -n "$FTP_SSH_KEY" ] && [ -f "$FTP_SSH_KEY" ]; then
+    echo "   Auth: SSH-Key ($FTP_SSH_KEY)"
+    USE_SSH_KEY=1
+else
+    echo "   Auth: Passwort"
+    USE_SSH_KEY=0
+fi
 echo ""
 
 # Prüfe ob wir im deployment/scripts/ Ordner sind und wechsle zur Projekt-Root
@@ -74,6 +83,23 @@ if [[ ! "$response" =~ ^[Yy]$ ]]; then
 fi
 
 echo "📤 Uploade via SFTP..."
+
+if [ $USE_SSH_KEY -eq 1 ]; then
+    # SSH-Key Authentifizierung
+    lftp -c "
+    set sftp:auto-confirm yes;
+    set ssl:verify-certificate no;
+    set sftp:connect-program 'ssh -i $FTP_SSH_KEY -p $FTP_PORT -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null';
+    open sftp://$FTP_USER@$FTP_HOST;
+    cd $FTP_PATH;
+    
+    lcd deployment/build;
+    mirror --reverse --delete --verbose --exclude-glob=node_modules/ --exclude-glob=.git/ --exclude-glob=.* --exclude area/ ./ ./;
+    
+    bye
+    "
+else
+    # Passwort Authentifizierung
     lftp -c "
     set sftp:auto-confirm yes;
     set ssl:verify-certificate no;
@@ -85,6 +111,7 @@ mirror --reverse --delete --verbose --exclude-glob=node_modules/ --exclude-glob=
 
     bye
     "
+fi
 
 if [ $? -eq 0 ]; then
     echo "✅ Upload erfolgreich!"