Remove the 127.0.0.1: from the port mapping for the dashboard so it reads -p 14002:14002 for the first and -p 14003:14002 for the second. Please note the 14002 on the end of that last one, you have it set wrong now. The internal port (the one after the : ) should always be 14002. After that you can access the dashboard from your Synology’s IP with the corresponding external port.
Alternatively you can use the earnings calculator.