Ok. So it was fairly easy (after 3h of playing around) both .nupkg and .snupkg should be on the same folder. Next it’s enough to push only .nupkg - .snupkg will be uploaded also. All will work fine then 
Ok. So it was fairly easy (after 3h of playing around) both .nupkg and .snupkg should be on the same folder. Next it’s enough to push only .nupkg - .snupkg will be uploaded also. All will work fine then