add version to startup logs

ErsatzTV/Startup.cs

@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Reflection;
 using System.Threading.Channels;
 using ErsatzTV.Application;
 using ErsatzTV.Application.Channels.Queries;
@@ -77,6 +78,11 @@ namespace ErsatzTV
 
             services.AddMudServices();
 
+            Log.Logger.Information(
+                "ErsatzTV version {Version}",
+                Assembly.GetEntryAssembly().GetCustomAttribute<AssemblyInformationalVersionAttribute>()
+                    ?.InformationalVersion ?? "unknown");
+
             Log.Logger.Warning("This is pre-alpha software and is likely to be unstable");
             Log.Logger.Warning(
                 "Give feedback at {GitHub} or {Discord}",