/Users/liyue/mt-project/server/index.js:1
(function (exports, require, module, __filename, __dirname) { import Koa from ‘koa’; ^^^

SyntaxError: Unexpected identifier
at new Script (vm.js:79:7)
at createScript (vm.js:251:10)
at Object.runInThisContext (vm.js:303:10)
at Module._compile (internal/modules/cjs/loader.js:657:28)
at loader (/Users/liyue/mt-project/node_modules/babel-register/lib/node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (/Users/liyue/mt-project/node_modules/babel-register/lib/node.js:154:7)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)