How to import gcc-arm project to platformio


I am trying to import the project from this link to platformio.
I am now compiling it using the makefile provided in the project, however, I would like to import this project as a platformio project, in order to be able to debug and program my device through platformio.

I tried adding the platformio.ini file with the following contents, however I cannot start the debugger:

env_default = nordicnrf52


platform = nordicnrf52

framework = arduino

board = nrf52_dk

debug_tool = jlink