@ionic/app-scripts/config/copy.config.js not found

[dodomui]

Refer to the documentation, need to add below code to copy.config.js. But I unable to locate this file.

copyStCachedImage: {
    src: ['{{ROOT}}/node_modules/st-cached-image/dist/cached-image**/*'],
    dest: '{{BUILD}}'
  }

Here is my environment

Ionic:

   Ionic CLI                     : 6.3.0 (/Users/nelsonmui/.nvm/versions/node/v12.16.1/lib/node_modules/@ionic/cli)
   Ionic Framework               : @ionic/angular 5.0.7
   @angular-devkit/build-angular : 0.803.25
   @angular-devkit/schematics    : 8.3.25
   @angular/cli                  : 8.3.25
   @ionic/angular-toolkit        : 2.2.0

Capacitor:

   Capacitor CLI   : 1.5.2
   @capacitor/core : 1.5.2

Cordova:

   Cordova CLI       : 9.0.0 ([email protected])
   Cordova Platforms : none
   Cordova Plugins   : no whitelisted plugins (0 plugins total)

Utility:

   cordova-res (update available: 0.11.0) : 0.9.0
   native-run                             : 0.3.0

System:

   ios-deploy : 1.10.0
   NodeJS     : v12.16.1 (/Users/nelsonmui/.nvm/versions/node/v12.16.1/bin/node)
   npm        : 6.14.4
   OS         : macOS Catalina
   Xcode      : Xcode 11.4 Build version 11E146