Update project configuration and structure with Docker support and environment variable adjustments

- Updated .env.example to reflect new LLM configuration with Aliyun's API.
- Enhanced .gitignore to include additional files and directories for better exclusion of sensitive and build artifacts.
- Added docker-compose.yml for streamlined deployment of backend and frontend services.
- Introduced Dockerfiles for both backend and frontend to facilitate containerized builds.
- Created README.md to provide comprehensive project documentation and setup instructions.
- Established nginx configuration for frontend to support API proxying and static file serving.

frontend/Dockerfile

@@ -0,0 +1,34 @@
+# MiroFish Frontend Dockerfile
+# Multi-stage build: Node.js build + Nginx serve
+
+# ============= Build Stage =============
+FROM node:20-alpine as builder
+
+WORKDIR /app
+
+# 复制 package 文件
+COPY package*.json ./
+
+# 安装依赖
+RUN npm ci
+
+# 复制源代码
+COPY . .
+
+# 构建生产版本
+RUN npm run build
+
+# ============= Production Stage =============
+FROM nginx:alpine
+
+# 复制 Nginx 配置
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# 复制构建产物
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+# 暴露端口
+EXPOSE 80
+
+# 启动 Nginx
+CMD ["nginx", "-g", "daemon off;"]

frontend/nginx.conf

@@ -0,0 +1,45 @@
+server {
+    listen 80;
+    server_name localhost;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Gzip 压缩
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;
+    gzip_min_length 1000;
+
+    # Vue Router history 模式支持
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # API 代理到后端
+    location /api/ {
+        proxy_pass http://backend:5001;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_cache_bypass $http_upgrade;
+        
+        # 超时设置（模拟可能耗时较长）
+        proxy_connect_timeout 60s;
+        proxy_send_timeout 300s;
+        proxy_read_timeout 300s;
+    }
+
+    # 健康检查代理
+    location /health {
+        proxy_pass http://backend:5001/health;
+    }
+
+    # 静态文件缓存
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}