Add warning when using the mapping command in debug mode (#3095)

Content.Server/Commands/GameTicking/MappingCommand.cs

@@ -1,3 +1,5 @@
+// ReSharper disable once RedundantUsingDirective
+// Used to warn the player in big red letters in debug mode
 using System.Linq;
 using Content.Server.Administration;
 using Content.Shared.Administration;
@@ -6,6 +8,7 @@ using Robust.Server.Interfaces.Timing;
 using Robust.Shared.Console;
 using Robust.Shared.Interfaces.Map;
 using Robust.Shared.IoC;
+using Robust.Shared.Maths;
 using Robust.Shared.Utility;
 
 namespace Content.Server.Commands.GameTicking
@@ -26,6 +29,10 @@ namespace Content.Server.Commands.GameTicking
                 return;
             }
 
+#if DEBUG
+            shell.WriteLine("WARNING: The server is using a debug build. You are risking losing your changes.", Color.Red);
+#endif
+
             var mapManager = IoCManager.Resolve<IMapManager>();
             int mapId;
             string mapName;