Sample instructions unclear with publish error

[seantleonard]

Elaborate in the instructions which specific publishing error should result in updating the dotnet sdk location in the database project extension settings.

Note: you might have to update the extension setting dotnet SDK location to /usr/bin/ to execute the publish step. This setting is called Dotnet SQL Location under Extensions > Database Projects.

On its own, the suggestion in the step-by-step instructions doesn't specify what should trigger us to update the sdk location. here is the error I received.

stdout: /workspaces/vscode-remote-try-sqlserver/TryDbProjects/TryDbProjects.sqlproj : warning : Unable to load the service index for source https://api.nuget.org/v3/index.json.
stdout:
stdout: /workspaces/vscode-remote-try-sqlserver/TryDbProjects/TryDbProjects.sqlproj : error : Unable to find package Microsoft.Build.Sql. No packages exist with this id in source(s): nuget.org
stdout: /workspaces/vscode-remote-try-sqlserver/TryDbProjects/TryDbProjects.sqlproj : error MSB4236: The SDK 'Microsoft.Build.Sql/0.1.3-preview' specified could not be found.
stdout: 1 Warning(s)
stdout: 2 Error(s)
stdout: Time Elapsed 00:08:53.18

also, 8 minutes to build ? what exactly is being built here, it seems to be just deploying a sql script?