按照Loopback文档创建的第一个simpleAPI就没成功，http://0.0.0.0:3000打开显示正常，但http://0.0.0.0:3000/explorer报错如下：
Error
404Cannot GET /explorer
status: 404
Error: Cannot GET /explorer
at raiseUrlNotFoundError (/Users/loopback-getting-started/node_modules/loopback/server/middleware/url-not-found.js:20:17)
at Layer.handle [as handle_request] (/Users/loopback-getting-started/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/Users/loopback-getting-started/node_modules/express/lib/router/index.js:317:13)
at /Users/loopback-getting-started/node_modules/express/lib/router/index.js:284:7
at Function.process_params (/Users/loopback-getting-started/node_modules/express/lib/router/index.js:335:12)
at next (/Users/loopback-getting-started/node_modules/express/lib/router/index.js:275:10)
at /Users/loopback-getting-started/node_modules/express/lib/router/index.js:635:15
at next (/Users/loopback-getting-started/node_modules/express/lib/router/index.js:260:14)
at Function.handle (/Users/loopback-getting-started/node_modules/express/lib/router/index.js:174:3)
at router (/Users/loopback-getting-started/node_modules/express/lib/router/index.js:47:12)
at Layer.handle [as handle_request] (/Users/loopback-getting-started/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/Users/loopback-getting-started/node_modules/express/lib/router/index.js:317:13)
at /Users/loopback-getting-started/node_modules/express/lib/router/index.js:284:7
at Function.process_params (/Users/loopback-getting-started/node_modules/express/lib/router/index.js:335:12)
at next (/Users/loopback-getting-started/node_modules/express/lib/router/index.js:275:10)
at nosniff (/Users/loopback-getting-started/node_modules/dont-sniff-mimetype/index.js:4:5)
解决方法：
创建server/component-config.json文件，添加内容：
{
"loopback-component-explorer": {
"mountPath":"/explorer"
}
}
没有loopback-component-explorer module的
npm install loopback-component-explorer
自行手动install
再次npm start
http://0.0.0.0:3000/explorer出现API
