fix: update script-tag output to include config from default.js

instead of hardcoded config

platform/viewer/.webpack/webpack.commonjs.js

@@ -12,7 +12,9 @@ const SRC_DIR = path.join(__dirname, '../src');
 const DIST_DIR = path.join(__dirname, '../dist');
 const PUBLIC_DIR = path.join(__dirname, '../public');
 // ~~ Env Vars
+const APP_CONFIG = process.env.APP_CONFIG || 'config/default.js';
 const HTML_TEMPLATE = process.env.HTML_TEMPLATE || 'script-tag.html';
+const PUBLIC_URL = process.env.PUBLIC_URL || '/';
 
 module.exports = (env, argv) => {
   const commonConfig = webpackCommon(env, argv, { SRC_DIR, DIST_DIR });
@@ -33,12 +35,22 @@ module.exports = (env, argv) => {
     plugins: [
       // Clean output.path
       new CleanWebpackPlugin(),
+      new CopyWebpackPlugin([
+        // Copy over and rename our target app config file
+        {
+          from: `${PUBLIC_DIR}/${APP_CONFIG}`,
+          to: `${DIST_DIR}/app-config.js`,
+        },
+      ]),
       // Generate "index.html" w/ correct includes/imports
       // NOTE: We use this for E2E Tests
       new HtmlWebpackPlugin({
         inject: false,
         template: `${PUBLIC_DIR}/html-templates/${HTML_TEMPLATE}`,
         filename: 'index.html',
+        templateParameters: {
+          PUBLIC_URL: PUBLIC_URL,
+        },
       }),
       new webpack.optimize.LimitChunkCountPlugin({
         maxChunks: 1,