I already developed my web app and published it to azure with asp.net core 1.1 and it was working fine until I upgraded my web application to Core 2.0 final
I was running 2.0.8, had to downgrade to 2.0.5 then it worked. The 2.0.8 didn't include a the Self-contained deployments (SCD) as supposed which 2.0.5 did.