Add new coin
Hi. I tried to add a new coin but it failed. I ask for help.

I compiled the project for both Windows and Linux without any problems, but when I run I get an error:
```
[2021-11-22 23:31:29.5038] [I] [Core] Version 62.0.0.0-master [5614c274189241c6aa9d5682211c682680bcb141] 
[2021-11-22 23:31:29.5520] [I] [Core] Runtime .NET 6.0.0-rtm.21522.10 on Linux 4.15.0-162-generic #170-Ubuntu SMP Mon Oct 18 11:38:05 UTC 2021 [X64] 
[2021-11-22 23:31:29.5761] [I] [Core] Prometheus Metrics 0.0.0.0:4000/metrics 
[2021-11-22 23:31:29.5761] [I] [Core] WebSocket notifications streaming 0.0.0.0:4000/notifications 
System.NullReferenceException: Object reference not set to an instance of an object.
   at Miningcore.Program.<>c.<ConfigurePostgres>b__29_0(Type t) in /home/user/miningcore/src/Miningcore/Program.cs:line 746
   at Autofac.Features.Scanning.ScanningRegistrationExtensions.<>c__DisplayClass4_1`2.<CanBeRegistered>b__1(Func`2 p)
   at System.Linq.Enumerable.All[TSource](IEnumerable`1 source, Func`2 predicate)
   at Autofac.Features.Scanning.ScanningRegistrationExtensions.<>c__DisplayClass4_0`2.<CanBeRegistered>b__0(Type t)
   at System.Linq.Utilities.<>c__DisplayClass1_0`1.<CombinePredicates>b__0(TSource x)
   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
   at Autofac.Features.Scanning.ScanningRegistrationExtensions.ScanTypesTemplate[TActivatorData,TScanStyle,TRegistrationBuilderStyle](IEnumerable`1 types, IComponentRegistryBuilder cr, IRegistrationBuilder`3 rb, Func`2 scannedConstructorFunc, Action`2 register)
   at Autofac.Features.Scanning.ScanningRegistrationExtensions.ScanTypes(IEnumerable`1 types, IComponentRegistryBuilder cr, IRegistrationBuilder`3 rb)
   at Autofac.Features.Scanning.ScanningRegistrationExtensions.ScanAssemblies(IEnumerable`1 assemblies, IComponentRegistryBuilder cr, IRegistrationBuilder`3 rb)
   at Autofac.Features.Scanning.ScanningRegistrationExtensions.<>c__DisplayClass11_0.<RegisterAssemblyTypes>b__0(IComponentRegistryBuilder cr)
   at Autofac.ContainerBuilder.Build(IComponentRegistryBuilder componentRegistry, Boolean excludeDefaultModules)
   at Autofac.ContainerBuilder.Build(ContainerBuildOptions options)
   at Autofac.Extensions.DependencyInjection.AutofacServiceProviderFactory.CreateServiceProvider(ContainerBuilder containerBuilder)
   at Microsoft.Extensions.Hosting.Internal.ServiceFactoryAdapter`1.CreateServiceProvider(Object containerBuilder)
   at Microsoft.Extensions.Hosting.HostBuilder.CreateServiceProvider()
   at Microsoft.Extensions.Hosting.HostBuilder.Build()
   at Miningcore.Program.Main(String[] args) in /home/user/miningcore/src/Miningcore/Program.cs:line 203
Cluster cannot start. Good Bye!
```
The wallet daemon is running, the RPC is configured, the Postgres is installed and configured.
