add docs

docs/plugins/index.js

@@ -1,18 +0,0 @@
-module.exports = function(context, options) {
-    return {
-      name: 'loaders',
-      configureWebpack(config, isServer) {
-        return {
-          module: {
-            rules: [
-              {
-                test: /\.(gif|png|jpe?g|svg)$/i,
-                exclude: /\.(mdx?)$/i,
-                use: ['file-loader', { loader: 'image-webpack-loader' }],
-              },
-            ],
-          },
-        };
-      },
-    };
-  };