fix validation for node_id

src/game/game.dto.ts

@@ -86,16 +86,18 @@ export class FlagboxDTO {
   objectivePointId: string;
   @IsString()
   @IsNotEmpty()
-  @Length(7)
+  @Length(7, 7)
   objectivePointDescription: string;
   @IsNumber()
   objectivePointMultiplier: number;
+  @IsOptional()
+  data: JSON;
 }
 
 export class FlagboxEventDTO {
   @IsString()
   @IsNotEmpty()
-  @Length(7)
+  @Length(7, 7)
   node_id: string;
   @IsNumber()
   @Min(0)