In @vue/cli 3.x:

• Create a vue.config.js file in the root folder of your project, if you don’t already have one.
• Have its contents as follows:

// vue.config.js
module.exports = {
  devServer: {
    proxy: {
      "/gists": {
        target: "https://api.github.com",
        secure: false
      }
    }
  }
};

Now any call to (assuming your dev server is at localhost:8080) http://localhost:8080/gists will be redirected to https://api.github.com/gists.

Another example: proxying all calls

Say you have a local backend server that is typically deployed at localhost:5000 and you want to redirect all calls to /api/anything to it. Use:

// vue.config.js
module.exports = {
    devServer: {
        proxy: {
            "/api/*": {
                target: "http://localhost:5000",
                secure: false
            }
        }
    }
};