The small white the project front-end architecture is vue, use of NPM on the local port test front-end, suddenly there is a project request pictures of access server, server is apache, I directly in the code with server HTTP request picture links, problems in this, I input link on the native browser can normal access images, but in the projects refer to the link will be submitted to the cross-domain error, since the browser can normal visit should be representative of cross-domain problem out on the back end,, then, what things do you need to configure the front end