Docker - 构建错误

[+] Building 3.2s (7/9) Docker:desktop-linux => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 1.62kB 0.0s => [internal] load metadata for Docker.io/library/ubuntu:16 0.2s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [1/6] FROM Docker.io/library/ubuntu:16.04@sha256:1f1a2d5 0.0s => CACHED [2/6] RUN apt-get update && apt-get install -y -- 0.0s => CACHED [3/6]