解决docker认证问题failedtoauthorize:failedtofetchoauthtoken

报错信息[bash1]解决方案 全局代理打开“buildkit”: false ，见[图1]

[bash1]

>docker build -t ffpg . [+] Building 71.8s (3/3) FINISHED docker:desktop-linux => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 23.36kB 0.0s => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 17) 0.0s => ERROR [internal] load metadata for docker.io/library/ubuntu:20.04 23.5s => [auth] library/ubuntu:pull token for registry-1.docker.io 0.0s ------ > [internal] load metadata for docker.io/library/ubuntu:20.04: ------ 1 warning found (use docker --debug to expand): - FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 17) Dockerfile:8 -------------------- 6 | # 7 | # 8 | >>> FROM ubuntu:20.04 AS base 9 | 10 | WORKDIR /tmp/workdir -------------------- ERROR: failed to solve: ubuntu:20.04: failed to resolve source metadata for docker.io/library/ubuntu:20.04: failed to authorize: failed to fetch oauth token: Post " auth.docker.io/token": dial tcp 69.63.176.15:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

[图1]