SampleDbContextFactory.cs

public class SampleDbContextFactory : IDesignTimeDbContextFactory<SampleDbContext>
{
    public SampleDbContext CreateDbContext(string[] args)
    {
        // Get DbContext from DI system
        var resolver = new DependencyResolver
        {
            CurrentDirectory = Path.Combine(Directory.GetCurrentDirectory(), "../NetCoreLambda")
        };
        return resolver.ServiceProvider.GetService(typeof(SampleDbContext)) as SampleDbContext;
    }
}