- Bot now takes shard id (optional) and total shards (optional) command line arguments (changed from shard id and parent process id)

- Sharding with coordinator now works properly
- Documented creds.yml RestartCommand - it has no effect when coordinator is starting the bot
- Regenerated creds_example.yml
- Removed all db migrators as the v3 requires the user to have updated 2.x all the way
- TotalShards in creds.yml gets overriden by coord.yml's TotalShards if the bot is ran through coordinator (more precisely, by the command line argument to the bot)
- Coordinator now runs on http://localhost:3442 by default, you can change this in appsettings.json
    - This is done because of macos https issues
    - Primarily because https for regular users is a massive hassle. Coordinator shouldn't be exposed anyway
- Minor cleanup

src/NadekoBot/Program.cs

@@ -1,14 +1,35 @@
-using NadekoBot;
+using System;
+using NadekoBot;
 using NadekoBot.Services;
 using Serilog;
 
 var pid = System.Environment.ProcessId;
 
 var shardId = 0;
-if (args.Length == 1)
-    int.TryParse(args[0], out shardId);
+int? totalShards = null; // 0 to read from creds.yml
+if (args.Length > 0)
+{
+    if (!int.TryParse(args[0], out shardId))
+    {
+        Console.Error.WriteLine("Invalid first argument (shard id)");
+        return;
+    }
+
+    if (args.Length > 1)
+    {
+        if (!int.TryParse(args[1], out var shardCount))
+        {
+            Console.Error.WriteLine("Invalid second argument (total shards)");
+            return;
+        }
+
+        totalShards = shardCount;
+    }
+}
+
+
 
 LogSetup.SetupLogger(shardId);
 Log.Information($"Pid: {pid}");
 
-await new Bot(shardId).RunAndBlockAsync();
+await new Bot(shardId, totalShards).RunAndBlockAsync();