fix: correct frontend Dockerfile path for vite build

Dockerfile.frontend

@@ -1,25 +1,26 @@
 # 医院绩效考核系统 - 前端 Dockerfile
 FROM node:18-alpine AS builder
 
-WORKDIR /app
+WORKDIR /app/frontend
 
 # 复制 package 文件
-COPY frontend/package*.json ./
+COPY frontend/package*.json ./frontend/
 
 # 安装依赖
-RUN npm install --production
+RUN npm install
 
 # 复制源代码
-COPY frontend/ ./
+COPY frontend/ ./frontend/
 
 # 构建前端
-RUN npm run build
+WORKDIR /app
+RUN cd frontend && npm run build
 
 # 生产阶段：使用 Nginx
 FROM nginx:alpine
 
 # 复制构建产物
-COPY --from=builder /app/dist /usr/share/nginx/html
+COPY --from=builder /app/frontend/dist /usr/share/nginx/html
 
 # 复制 Nginx 配置
 COPY frontend/nginx.conf /etc/nginx/conf.d/default.conf