go运行的时候，一直提示build command-line-arguments

echo go run main.go

build command-line-arguments: cannot load github.com/labstack/echo: module github.com/labstack/echo: Get https://proxy.golang.org/github.com/labstack/echo/@v/list: dial tcp 216.58.200.241:443: i/o timeout

解决方案，

export GOPROXY="https://goproxy.cn"