public class FieldMapRepoModule : Module
    {
        protected override void Load(ContainerBuilder builder)
        {
            var thisAssembly = typeof(FieldMapRepoModule).Assembly;

            builder.Register(c =>
            {
                var configuration = c.Resolve<IConfigurationRoot>();
                return configuration.GetSection("FieldMapRepoSettings").Get<Environment>();
            }).As<IEnvironment>();

            builder.Register(c =>
            {
                var configuration = c.Resolve<IConfigurationRoot>();
                var contextBuilder = new DbContextOptionsBuilder<GenesisDbContext>();
                var sqlConfiguration = configuration.GetSection("FieldMapRepoSettings").GetValue<string>("ConnectionString");
                contextBuilder.UseSqlServer(sqlConfiguration);

                var dbContextOptions = contextBuilder.Options;
                return dbContextOptions;
            }).SingleInstance();

            builder.RegisterType<GenesisDbContext>().InstancePerLifetimeScope();

            builder.RegisterAssemblyTypes(thisAssembly)
                   .AsClosedTypesOf(typeof(Core.FieldValues.IRepository<>))
                   .InstancePerLifetimeScope();
        }
    }


JSON:
{
  "GenesisHttpConfiguration": {
    "UserName": "xxxx",
    "Password": "xxxxx",
    "Host": "xxxxxxx",
    "AuthCookieUri": "xxxxxx",
    "AuthCookieName": "xxxxxx"
  },
  "APPINSIGHTS_INSTRUMENTATIONKEY": "xxxxxx",
  "StorageConfiguration": {
    "FiberJobs": "xxxxxx"
  },
  "FieldMapRepoSettings": {
    "ConnectionString": "xxxxxxx",
    "Environment": {
      "EnvironmentName": "DEV"
    }
  }
}