abp/modules/virtual-file-explorer/app/Data/DemoAppDbContextFactory.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Design;

namespace DemoApp.Data;

public class DemoAppDbContextFactory : IDesignTimeDbContextFactory<DemoAppDbContext>
{
    public DemoAppDbContext CreateDbContext(string[] args)
    {
        var configuration = BuildConfiguration();

        var builder = new DbContextOptionsBuilder<DemoAppDbContext>()
            .UseSqlServer(configuration.GetConnectionString("Default"));

        return new DemoAppDbContext(builder.Options);
    }

    private static IConfigurationRoot BuildConfiguration()
    {
        var builder = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json", optional: false);

        return builder.Build();
    }
}