I am wondering is anybody can assist me with updgrading from V10 to V11? I am trying to do this on a hosting server and it doesn't have Visual Studio installed. I have previously been installing and upgrading V10 on the server using these command line commands:

dotnet add package Umbraco.Cms.Core
dotnet add package Umbraco.Cms
dotnet add package Umbraco.Cms.SqlCe
dotnet restore
dotnet build

These are the errors that I am seeing:

C:\websites\ProjectName\Startup.cs(32,22): error CS1061: 'IServiceCollection' does not contain a definition for 'AddUmbraco' and no accessible extension method 'AddUmbraco' accepting a first argument of type 'IServiceCollection' could be found (are you missing a using directive or an assembly reference?) [C:\websites\ProjectName\ProjectName.csproj]
C:\websites\ProjectName\Startup.cs(51,17): error CS1061: 'IApplicationBuilder' does not contain a definition for 'UseUmbraco' and no accessible extension method 'UseUmbraco' accepting a first argument of type 'IApplicationBuilder' could be found (are you missing a using directive or an assembly reference?) [C:\websites\ProjectName\ProjectName.csproj]

Would I be better off installing a new Umbraco 11 website, and then copying my files and settings into this?