local packaging for asset files

gulpfile.js

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+// Load gulp and gulp-copy
+var gulp = require('gulp');
+var copy = require('gulp-copy');
+
+// Define a task to copy all css and js files from the source directory
+gulp.task('copy-assets', function() {
+  // Use a glob pattern to select all css and js files in the source directory and its subdirectories
+  return gulp.src([
+    './node_modules/bootstrap/dist/**/*.+(css|js)',
+    './node_modules/feather-icons/dist/**/*.+(css|js)',
+    './node_modules/progress-tracker/src/styles/*.+(css|js)'    
+  ]) // Specify the base folder as src
+  .pipe(copy('./assets/', { // Copy the files to the assets folder
+    prefix: 3, // Remove the src folder from the path
+    rename: function(path) { // Rename the path
+      if (path.extname === '.css') { // If the file is a css file
+        path.dirname = 'css'; // Change the folder name to css
+      } else if (path.extname === '.js') { // If the file is a js file
+        path.dirname = 'js'; // Change the folder name to js
+      }
+    }
+  }));
+});
+
+// Define a default task that runs the copy-assets task
+gulp.task('default', gulp.series('copy-assets'));