startRound에 닉네임 포함하여 전송

@@ -112,6 +112,7 @@ interface ServerOutboundMessageMap {
     duration: number;
     roles: {
       username: string;
+      nickname: string;
       role: Role;
     }[];
   };

@@ -259,13 +259,22 @@ export class Game {
     });
   }
 
-  private makeRoleArray(): { username: string; role: Role }[] {
+  private makeRoleArray(): {
+    username: string;
+    nickname: string;
+    role: Role;
+  }[] {
     let roleArray: {
       username: string;
+      nickname: string;
       role: Role;
     }[] = [];
     this.roles.forEach((role, user) =>
-      roleArray.push({ username: user.username, role: role })
+      roleArray.push({
+        username: user.username,
+        nickname: user.nickname,
+        role: role,
+      })
     );
     return roleArray;
   }