chore: add pnpm workspace configuration for apps and packages

doc/monorepo-guide.md

@@ -379,7 +379,7 @@ import {
 
 @WebSocketGateway({ namespace: 'chat' })
 export class ChatGateway implements OnGatewayConnection {
-  
+
   @SubscribeMessage(WebSocketEventType.JOIN_CONVERSATION)
   async handleJoin(
     @MessageBody() payload: JoinConversationPayload,
@@ -496,7 +496,7 @@ export function useChat(conversationId: string) {
 
   const sendMessage = useCallback((content: string) => {
     if (!socket) return;
-    
+
     const payload: SendMessagePayload = {
       conversationId,
       content,
@@ -616,7 +616,7 @@ services:
 
 ```dockerfile
 # apps/backend/Dockerfile
-FROM node:20-alpine AS base
+FROM node:24-alpine AS base
 RUN npm install -g pnpm
 
 FROM base AS dependencies