Is this just someone reposting espressif's esp-drone (https://github.com/espressif/esp-drone) and passing it off as their own (and DigiKey posting it on their site)? They talk about making a custom PCB, but it looks pretty much the same.
The repository linked from the article (https://github.com/Circuit-Digest/ESP-Drone) has some issues claiming there's malware in it, and the commit history looks a little suspicious, but I could be wrong.