The single sided board present a problem to solder the display pins, as the solder side is under the display. That can be worked around with extra pads to solder bare wires that can be wrapped in the display pins.

Nevertheless I planned to order the boards from a PCB shop then I have added a second possibility for assembling an ATMega328 directly on the PCB, instead of an Arduino nano, on the TOP layer. 

The boards arrived recently