Hooks up a quite old "WS2300"-model weather station to MQTT

1. Be root
2. Install nodejs on jour raspberry pi
3. Adjust config.json to your needs
4. Change directory into the repository and run:
   1. npm install
   2. npm start
5. Check if it works. Stop execution witch Ctrl+C. Adjust whatever needed if an problem occur and try again with step 4. If everything is fine, continue with step 6.
6. Create systemd-service-unit-file at /etc/systemd/system/mqtt2ws2300.service with follwing content:

[Unit]
Description=mqtt2ws2300 Bridge
After=network.target

[Service]
Type=simple
WorkingDirectory=/path/to/repository/mqtt2ws2300 #<--- adjust to match your environment
ExecStart=npm start #<--- maybe use a absolute path to npm
User=pi
SendSIGKILL=no
Restart=on-failure

[Install]
WantedBy=multi-user.target

7. Reload systemd serice deamon with systemctl daemon-reload
8. Enable the mqtt2rf service with systemctl enable mqtt2ws2300
9. Start the mqtt2rf service with systemctl start mqtt2ws2300