Add render.static option to customize serve-static middleware

lib/nuxt.js

@@ -50,6 +50,7 @@ class Nuxt {
         scrollBehavior: null
       },
       render: {
+        static: {},
         gzip: {
           threshold: 0
         },
@@ -90,7 +91,7 @@ class Nuxt {
     // renderer used by Vue.js (via createBundleRenderer)
     this.renderer = null
     // For serving static/ files to /
-    this.serveStatic = pify(serveStatic(resolve(this.srcDir, 'static')))
+    this.serveStatic = pify(serveStatic(resolve(this.srcDir, 'static'), this.options.render.static))
     // For serving .nuxt/dist/ files (only when build.publicPath is not an URL)
     this.serveStaticNuxt = pify(serveStatic(resolve(this.dir, '.nuxt', 'dist'), {
       maxAge: (this.dev ? 0 : '1y') // 1 year in production

test/fixtures/with-config/nuxt.config.js

@@ -37,5 +37,10 @@ module.exports = {
   },
   css: [
     { src: '~/assets/app.css' }
-  ]
+  ],
+  render: {
+    static: {
+      maxAge: '1y'
+    }
+  }
 }

test/fixtures/with-config/static/test.txt

@@ -0,0 +1 @@
+A test here :)

test/with-config.test.js

@@ -1,5 +1,7 @@
 import test from 'ava'
 import { resolve } from 'path'
+import rp from 'request-promise-native'
+
 const port = 4007
 const url = (route) => 'http://localhost:' + port + route
 
@@ -91,6 +93,11 @@ test('Check stats.json generated by build.analyze', t => {
   t.is(stats.assets.length, 29)
 })
 
+test('Check /test.txt with custom serve-static options', async t => {
+  const { headers } = await rp(url('/test.txt'), { resolveWithFullResponse: true })
+  t.is(headers['cache-control'], 'public, max-age=31536000')
+})
+
 // Close server and ask nuxt to stop listening to file changes
 test.after('Closing server and nuxt.js', t => {
   server.close()