How to order PCBs from gerber files

More information in blog:

https://www.40percent.club/2019/09/flirc-1-button.html

EasyEDA ordering info:

63mm Max* 90mm Max;
Layers: 2;
PCB Thickness: 1.6mm;
PCB Qty.: 5;
PCB Color: Black;
Surface Finish: HASL;
Copper Weight: 1;
Panelized PCBs: 1

Gerber files released under https://creativecommons.org/licenses/by-sa/4.0/