Fix missing logs

BTCPayServer/Logging/Logs.cs

@@ -15,9 +15,14 @@ namespace BTCPayServer.Logging
         }
         public static void Configure(ILoggerFactory factory)
         {
-            Configuration = factory.CreateLogger("Configuration");
+            if (factory == null)
-            PayServer = factory.CreateLogger("PayServer");
+                Configure(new FuncLoggerFactory(n => NullLogger.Instance));
-            Events = factory.CreateLogger("Events");
+            else
+            {
+                Configuration = factory.CreateLogger("Configuration");
+                PayServer = factory.CreateLogger("PayServer");
+                Events = factory.CreateLogger("Events");
+            }
         }
         public static ILogger Configuration
         {

BTCPayServer/Program.cs

@@ -31,9 +31,14 @@ namespace BTCPayServer
             var logger = loggerFactory.CreateLogger("Configuration");
             try
             {
+                // This is the only way toat LoadArgs can print to console. Because LoadArgs is called by the HostBuilder before Logs.Configure is called
                 var conf = new DefaultConfiguration() { Logger = logger }.CreateConfiguration(args);
                 if (conf == null)
                     return;
+                Logs.Configure(loggerFactory);
+                new BTCPayServerOptions().LoadArgs(conf);
+                Logs.Configure(null);
+                /////
 
                 host = new WebHostBuilder()
                     .UseKestrel()
@@ -64,6 +69,8 @@ namespace BTCPayServer
             finally
             {
                 processor.Dispose();
+                if(host == null)
+                    Logs.Configuration.LogError("Configuration error");
                 if (host != null)
                     host.Dispose();
                 loggerProvider.Dispose();