add note to mention tooling might already be installed
add note to mention tooling might already be installed

MienDev/IdentityServer4,IdentityServer/IdentityServer4,chrisowhite/IdentityServer4,MienDev/IdentityServer4,chrisowhite/IdentityServer4,MienDev/IdentityServer4,IdentityServer/IdentityServer4,chrisowhite/IdentityServer4,IdentityServer/IdentityServer4,IdentityServer/IdentityServer4,MienDev/IdentityServer4