This is upload file on google cloud storage. For details how to use the google cloud storage click here
golang 1.11.1
$ mkdir $GOPATH/src/github.com/y-ogura
$ cd $GOPATH/src/github.com/y-ogura
$ git clone https://github.com/y-ogura/echo-google-cloud-storage.git
$ cd echo-google-cloud-storage
$ cp .envrc.example .envrc // after edit .envrc
$ go build
$ ./echo-google-cloud-storage