Entity Framework Core migrations using dockerized postgresql image. No such host is known exception

In my aspnet.core project I would like to use my dockerized postgresql image.
Container is running correctly. (I am using Windows but server running on ubuntu18.04 server)

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
    a01980eb90bc        postgres:11.4       "docker-entrypoint.s…"   11 minutes ago      Up 11 minutes       0.0.0.0:5432->5432/tcp   pg

appsettings.json file looks like

    "ConnectionStrings": {
        "LibvirtConnection": "User ID =postgres;Password=*****;Server=185.22.98.7:5432;Port=5432;Database=libvirt;Integrated Security=true;Pooling=true;"
      },

Startup class looks like

   public void ConfigureServices(IServiceCollection services)
            {
                services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
                services.AddEntityFrameworkNpgsql().AddDbContext<AppDbContext>(opt =>
                    opt.UseNpgsql(Configuration.GetConnectionString("LibvirtConnection")));
            }

I got exception when I try run dotnet ef database update

    dotnet ef database update
    info: Microsoft.EntityFrameworkCore.Infrastructure[10403]
          Entity Framework Core 2.2.6-servicing-10079 initialized 'AppDbContext' using provider 'Npgsql.EntityFrameworkCore.PostgreSQL' with options: None
    System.Net.Sockets.SocketException (11001): No such host is known
       at System.Net.Dns.InternalGetHostByName(String hostName)
       at System.Net.Dns.GetHostAddresses(String hostNameOrAddress)
       at Npgsql.NpgsqlConnector.Connect(NpgsqlTimeout timeout) in C:\projects\npgsql\src\Npgsql\NpgsqlConnector.cs:line 663
       at Npgsql.NpgsqlConnector.RawOpen(NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken) in C:\projects\npgsql\src\Npgsql\NpgsqlConnector.cs:line 555
       at Npgsql.NpgsqlConnector.Open(NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken) in C:\projects\npgsql\src\Npgsql\NpgsqlConnector.cs:line 414
       at Npgsql.NpgsqlConnection.<>c__DisplayClass32_0.<<Open>g__OpenLong|0>d.MoveNext() in C:\projects\npgsql\src\Npgsql\NpgsqlConnection.cs:line 273
    --- End of stack trace from previous location where exception was thrown ---
       at Npgsql.NpgsqlConnection.Open() in C:\projects\npgsql\src\Npgsql\NpgsqlConnection.cs:line 153
       at Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.NpgsqlDatabaseCreator.Exists() in C:\projects\npgsql-entityframeworkcore-postgresql\src\EFCore.PG\S   at Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.NpgsqlDatabaseCreator.Exists() in C:\projects\npgsql-entityframeworkcore-postgresql\src\EFCore.PG\Storage\Internal\NpgsqlDatabaseCreator.cs:line 190
       at Microsoft.EntityFrameworkCore.Migrations.HistoryRepository.Exists()
       at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.Migrate(String targetMigration)
       at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.UpdateDatabase(String targetMigration, String contextType)
       at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabase.<>c__DisplayClass0_1.<.ctor>b__0()
       at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
    No such host is known

The reason was I combined my server and port together

Before: Server=185.22.98.7:5432;Port=5432

After: Server=185.22.98.7;Port=5432