chore: add pnpm workspace configuration for apps and packages

apps/frontend/Dockerfile

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+# apps/frontend/Dockerfile
+FROM node:24-alpine AS base
+RUN npm install -g pnpm@8
+
+FROM base AS dependencies
+WORKDIR /app
+
+# Copy workspace configuration
+COPY pnpm-workspace.yaml package.json ./
+COPY apps/frontend/package.json ./apps/frontend/
+COPY packages/shared/package.json ./packages/shared/
+
+# Install dependencies
+RUN pnpm install --frozen-lockfile
+
+FROM base AS build
+WORKDIR /app
+COPY --from=dependencies /app/node_modules ./node_modules
+COPY --from=dependencies /app/apps/frontend/node_modules ./apps/frontend/node_modules
+COPY --from=dependencies /app/packages/shared/node_modules ./packages/shared/node_modules
+
+# Copy source code
+COPY packages/shared ./packages/shared
+COPY apps/frontend ./apps/frontend
+
+# Build shared packages first
+RUN pnpm --filter @dreamchat/shared build
+
+# Build frontend
+RUN pnpm --filter @dreamchat/frontend build
+
+# Production stage - using serve for static files
+# External reverse proxy (nginx/traefik/etc.) expected
+FROM node:24-alpine AS production
+WORKDIR /app
+
+# Install serve
+RUN npm install -g serve
+
+# Copy built assets
+COPY --from=build /app/apps/frontend/dist ./dist
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs
+RUN adduser -S nodejs -u 1001
+USER nodejs
+
+EXPOSE 3000
+
+# Serve static files
+# Note: External reverse proxy should handle:
+# - SSL/TLS termination
+# - Path routing (/api -> backend, / -> frontend)
+# - WebSocket proxying
+CMD ["serve", "-s", "dist", "-l", "3000"]

apps/frontend/package.json

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+{
+  "name": "@dreamchat/frontend",
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "preview": "vite preview",
+    "test": "vitest",
+    "lint": "eslint . --ext ts,tsx",
+    "clean": "rm -rf dist"
+  },
+  "dependencies": {
+    "@dreamchat/shared": "workspace:*",
+    "@tanstack/react-query": "^5.0.0",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
+    "react-router-dom": "^6.20.0",
+    "socket.io-client": "^4.7.0",
+    "zustand": "^4.5.0"
+  },
+  "devDependencies": {
+    "@types/react": "^18.2.0",
+    "@types/react-dom": "^18.2.0",
+    "@vitejs/plugin-react": "^4.2.0",
+    "autoprefixer": "^10.4.0",
+    "postcss": "^8.4.0",
+    "tailwindcss": "^3.4.0",
+    "typescript": "^5.3.0",
+    "vite": "^5.0.0",
+    "vitest": "^1.0.0"
+  }
+}

apps/frontend/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "include": ["src"],
+  "references": [{ "path": "./tsconfig.node.json" }]
+}

apps/frontend/tsconfig.node.json

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+{
+  "compilerOptions": {
+    "composite": true,
+    "skipLibCheck": true,
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.ts"]
+}

apps/frontend/vite.config.ts

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+import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
+import path from 'path';
+
+export default defineConfig({
+  plugins: [react()],
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
+  server: {
+    port: 5173,
+    proxy: {
+      // Development proxy - external reverse proxy used in production
+      '/api': {
+        target: 'http://localhost:3000',
+        changeOrigin: true,
+      },
+      '/ws': {
+        target: 'ws://localhost:3000',
+        ws: true,
+      },
+    },
+  },
+  build: {
+    outDir: 'dist',
+    sourcemap: true,
+  },
+});