SMD Manufacturing: Need a hotplate and solderpaste
Good to haves:
- Oscillator
Decoupling Caps
Expose UART via connector
Programming Button
Onboard LED
Reset Button
You don't have to populate everything! Only these are mandatory:
Reset Button
Find the reference schematic here: https://www.arduino.cc/en/uploads/Main/ArduinoNano30Schematic.pdf