Merge branch 'mg-enable-webpack-host-check' into 'master'

Enable host check for webpack-dev-server

See merge request gitlab-org/gitlab!46459

config/webpack.config.js

@@ -555,7 +555,6 @@ module.exports = {
     host: DEV_SERVER_HOST,
     port: DEV_SERVER_PORT,
     https: DEV_SERVER_HTTPS,
-    disableHostCheck: true,
     headers: {
       'Access-Control-Allow-Origin': '*',
       'Access-Control-Allow-Headers': '*',