add chapters and deploy script

mathquest.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=MathQuest - Mathe-Lernseite für Kinder
+After=network.target
+
+[Service]
+Type=simple
+User=www-data
+WorkingDirectory=/var/www/mathquest
+ExecStart=/usr/bin/node /var/www/mathquest/server.js
+Restart=always
+RestartSec=10
+StandardOutput=journal
+StandardError=journal
+Environment=NODE_ENV=production
+Environment=PORT=3000
+
+[Install]
+WantedBy=multi-user.target