a sample application with login function using MetaMask, built with Echo + Vue.js
$ mkdir -p $GOPATH/src/github.com/m0t0k1ch1
$ cd $GOPATH/src/github.com/m0t0k1ch1
$ git clone git@github.com:m0t0k1ch1/metamask-login-sample.git
$ cd metamask-login-sample
$ npm ci$ go build
$ npm run build$ ./metamask-login-sample