feat: lesion-tracker extension (#1420)

* chore: init lesion-tracker extension

* chore: dev build for lesion-tracker extension

* fix: a more appropriate library name

* chore: fix script naming

platform/viewer/.webpack/webpack.pwa.js

@@ -26,6 +26,7 @@ const PUBLIC_URL = process.env.PUBLIC_URL || '/';
 const APP_CONFIG = process.env.APP_CONFIG || 'config/default.js';
 const PROXY_TARGET = process.env.PROXY_TARGET;
 const PROXY_DOMAIN = process.env.PROXY_DOMAIN;
+const ENTRY_TARGET = process.env.ENTRY_TARGET || `${SRC_DIR}/index.js`;
 
 module.exports = (env, argv) => {
   const baseConfig = webpackBase(env, argv, { SRC_DIR, DIST_DIR });
@@ -33,6 +34,9 @@ module.exports = (env, argv) => {
   const hasProxy = PROXY_TARGET && PROXY_DOMAIN;
 
   const mergedConfig = merge(baseConfig, {
+    entry: {
+      app: ENTRY_TARGET,
+    },
     output: {
       path: DIST_DIR,
       filename: isProdBuild ? '[name].bundle.[chunkhash].js' : '[name].js',