go: module github.com/gin-gonic/gin: Get "https://proxy.golang.org/github.com/gin-gonic/gin/@v/list": dial tcp 172.217.160.113:443: connectex: A connection attem
pt 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.

运行：go env -w GOPROXY=https://goproxy.cn,direct go get下载成功