fix: set cache-control header on static files

Author: Guillaume Chau

packages/@vue/cli-ui/apollo-server/server.js

@@ -8,11 +8,21 @@ const plugins = require('./connectors/plugins')
 const distPath = path.resolve(__dirname, '../dist')
 const publicPath = path.resolve(__dirname, '../ui-public')
 
+const CACHE_CONTROL = 'no-store, no-cache, must-revalidate, private'
+
 module.exports = app => {
-  app.use(express.static(distPath, { maxAge: 0 }))
-  app.use('/public', express.static(publicPath, { maxAge: 0 }))
+  app.use(express.static(distPath, { setHeaders }))
+  app.use('/public', express.static(publicPath, { setHeaders }))
   app.use('/_plugin/:id/*', plugins.serve)
   app.use('/_plugin-logo/:id', plugins.serveLogo)
   app.use('/_addon/:id/*', clientAddons.serve)
-  app.use(fallback(path.join(distPath, 'index.html'), { maxAge: 0 }))
+  app.use(fallback(path.join(distPath, 'index.html'), {
+    headers: {
+      'Cache-Control': CACHE_CONTROL
+    }
+  }))
+}
+
+function setHeaders (res, path, stat) {
+  res.set('Cache-Control', CACHE_CONTROL)
 }