chore: Apply IDE suggestions

Author: alex289

DockerDiscordBot/Commands/Help/HelpCommandHandler.cs

@@ -14,10 +14,10 @@ public sealed class HelpCommandHandler : IRequestHandler<HelpCommand>
 
     public HelpCommandHandler(
         ILogger<HelpCommandHandler> logger,
-        IOptions<ApplicationSettings> _options)
+        IOptions<ApplicationSettings> options)
     {
         _logger = logger;
-        _commandPrefix = _options.Value.CommandPrefix;
+        _commandPrefix = options.Value.CommandPrefix;
     }
 
     public async Task Handle(HelpCommand request, CancellationToken cancellationToken)

DockerDiscordBot/Extensions/CommandsExtensions.cs

@@ -13,9 +13,9 @@ public static class CommandsExtensions
             return null;
         }
 
-        var command = message.Content.Substring(1).Split(' ')[0];
+        var command = message.Content.Substring(1).Split(' ').FirstOrDefault();
 
-        if (!CommandMapping.Commands.ContainsKey(command))
+        if (command is null || !CommandMapping.Commands.ContainsKey(command))
         {
             return null;
         }