# 极简静态资源镜像
FROM nginx:alpine

# 安装 wget 用于健康检查
RUN apk add --no-cache wget

# 极简静态资源镜像
FROM nginx:alpine

# 安装 wget 用于健康检查
RUN apk add --no-cache wget

# 创建自定义 nginx 配置，禁用缓存并确保正确读取挂载目录
RUN printf 'server {\n\
    listen 80;\n\
    server_name localhost;\n\
    root /usr/share/nginx/html;\n\
    index index.html index.htm;\n\
    \n\
    # 禁用缓存\n\
    add_header Cache-Control "no-cache, no-store, must-revalidate";\n\
    add_header Pragma "no-cache";\n\
    add_header Expires "0";\n\
    \n\
    location / {\n\
        try_files $uri $uri/ /index.html;\n\
        # 确保每次都读取最新文件\n\
        sendfile off;\n\
        tcp_nodelay on;\n\
        tcp_nopush off;\n\
    }\n\
    \n\
    # 禁用所有静态文件缓存\n\
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {\n\
        add_header Cache-Control "no-cache, no-store, must-revalidate";\n\
        add_header Pragma "no-cache";\n\
        add_header Expires "0";\n\
    }\n\
}\n' > /etc/nginx/conf.d/default.conf

# 确保挂载目录存在但为空（避免与外部挂载冲突）
RUN mkdir -p /usr/share/nginx/html && \
    rm -rf /usr/share/nginx/html/* && \
    echo "Waiting for external mount..." > /usr/share/nginx/html/.placeholder

# 暴露静态服务端口
EXPOSE 80

# 启动 nginx 前台运行
CMD ["nginx", "-g", "daemon off;"]