Add Boostrap

config/webpack/environment.js

@@ -1,3 +1,13 @@
 const { environment } = require('@rails/webpacker')
+const webpack = require('webpack')
+
+environment.plugins.append(
+  'Provide',
+  new webpack.ProvidePlugin({
+    $: 'jquery',
+    jQuery: 'jquery',
+    Popper: ['popper.js', 'default']
+  })
+)
 
 module.exports = environment