webpackDevServer: don't fallback or redirect to index

This was causing problems when we typed in a bad URL since instead of
getting the expected 404 error, we just got the index page no matter
what the request was actually for.

config/webpackDevServer.config.js

@@ -4,7 +4,6 @@ const fs = require('fs');
 const evalSourceMapMiddleware = require('react-dev-utils/evalSourceMapMiddleware');
 const noopServiceWorkerMiddleware = require('react-dev-utils/noopServiceWorkerMiddleware');
 const ignoredFiles = require('react-dev-utils/ignoredFiles');
-const redirectServedPath = require('react-dev-utils/redirectServedPathMiddleware');
 const paths = require('./paths');
 const getHttpsConfig = require('./getHttpsConfig');
 
@@ -96,12 +95,7 @@ module.exports = function (proxy, allowedHost) {
 
     https: getHttpsConfig(),
     host,
-    historyApiFallback: {
-      // Paths with dots should still use the history fallback.
-      // See https://github.com/facebook/create-react-app/issues/387.
-      disableDotRule: true,
-      index: paths.publicUrlOrPath,
-    },
+    historyApiFallback: false,
     // `proxy` is run between `before` and `after` `webpack-dev-server` hooks
     proxy,
     onBeforeSetupMiddleware(devServer) {
@@ -116,9 +110,6 @@ module.exports = function (proxy, allowedHost) {
       }
     },
     onAfterSetupMiddleware(devServer) {
-      // Redirect to `PUBLIC_URL` or `homepage` from `package.json` if url not match
-      devServer.app.use(redirectServedPath(paths.publicUrlOrPath));
-
       // This service worker file is effectively a 'no-op' that will reset any
       // previous service worker registered for the same host:port combination.
       // We do this in development to avoid hitting the production cache if