i followed all the steps but still couldn't get succeeded, and facing " HTTP Error 502.5 - Process Failure " issue and in event log " application 'machine/webroot/apphost/webnosource' with physical root 'e:\nopcom42\' failed to start process with commandline 'e:\nopcom42\nop.web.exe ', errorcode = '0x800700d8' : 0."
Don't have the doc personally, but pointers would be:
follow MS docs to install/config IIS for NET CORE 2.x environment
make sure DOTNET CORE 2.2.x runtime and hosting bundle installed on server.
make sure the IIS APP pool user has modify permissions on nopcommerce folders as listed here http://docs.nopcommerce.com/display/en/Installation+guide
All the Best