Add new file

server/index.js

+const express = require('express')
+const consola = require('consola')
+const proxy = require('express-http-proxy')
+const { Nuxt, Builder } = require('nuxt')
+
+// const PROXY_URL = 'http://localhost:9000'; // 反向代理域名，测试
+const PROXY_URL = 'http://elm-api.caibowen.net'; // 反向代理域名，生产
+
+const app = express()
+const port = process.env.PORT || 3001
+
+app.set('port', port)
+
+// Import and Set Nuxt.js options
+let config = require('../nuxt.config.js')
+config.dev = !(process.env.NODE_ENV === 'production')
+
+app.use('/api', proxy(PROXY_URL));
+
+async function start() {
+  // Init Nuxt.js
+  const nuxt = new Nuxt(config)
+
+  // Build only in dev mode
+  if (config.dev) {
+    const builder = new Builder(nuxt)
+    await builder.build()
+  }
+
+  // Give nuxt middleware to express
+  app.use(nuxt.render)
+
+  // Listen the server
+  app.listen(port)
+  consola.ready({
+    message: `Server listening on http://localhost:${port}`,
+    badge: true
+  })
+}
+start()