How to use NbSpinnerService integrate ngx-admin app into existing angular-cli app?

Hi @nnixaa ,
I am using ngx-admin theme for my admin panel into my existing project and i am adding your ngx admin panel into my existing project according to your docs. I saw there are only few docs about using existing project. I want implementing NbSpinnerService into my project when enter my url then spinner image show until loading my content or view. Please help me to solve this to add spinner service into my

Thanks
Raihan