报错：好像是源的问题

FROM ubuntu

MAINTAINER wbf

RUN sed -i 's/archive.ubuntu.com/mirrors.aliyun.com/g' /etc/apt/sources.list

RUN apt-get update

RUN apt-get install -y nginx

COPY index.html /var/www/html

ENTRYPOINT ["/usr/sbin/nginx", "-g", "daemon off;"]

EXPOSE 80