Making it easy for people to connect my small Linux device to the Wifi - C C++ Golang Linux

I need to make my small Linux device user friendly for non-tech people to connect it to the Wifi. ############## I need something similar to this: 1. Connect your phone to the Wifi 2. Download the App for the Smart Plug on your phone 3. Plug in the "Smart Plug" to the wall (The Smart Plug will start looking for Wifi access points to connect to) 4. You will see in your App the device is listed, then you click on the device to add it Example screenshots and vieo: [login to view URL] ############## We have a small Linux device and would like to easily connect it to the Wifi, without going through too many steps. We like to make this Plug-n-Play kind of thing. This may or may not be complicated depending on your skills. It's also ok if you have an alternative way of getting this done. The device we run have a full Debian Linux installed, we can also a separate server to help accomplishing this task. Thanks!