Fix xxxWindowPreference management

backend/README.md

@@ -2,32 +2,21 @@
 
 The backend is static. Typescript scripts are compiled into the `dist` folder and served through a node web server.
 
-You can avoid the manual shutdown/recompile/restart command line cycle by setting up watchers.
+You can avoid the manual shutdown/recompile/restart command line cycle by using a watcher.
 
 Make sure you are in the `backend` directory `cd backend`.
 
-1. Install nodemon 
+1. Install nodemon and ts-node
+
 ```
-sudo npm install -g nodemon
-```
-2. [Optional] Add the following configuration into `tsconfig.json`. You can find watch options here https://www.typescriptlang.org/docs/handbook/configuring-watch.html
-```
-    "watchOptions": {
-      "watchFile": "useFsEvents",
-      "watchDirectory": "useFsEvents",
-      "fallbackPolling": "dynamicPriority",
-      "synchronousWatchDirectory": true,
-      "excludeDirectories": ["**/node_modules", "_build"],
-      "excludeFiles": ["build/fileWhichChangesOften.ts"]
-    }
-```
-3. In one terminal, watch typescript scripts
-```
-./node_modules/typescript/bin/tsc --watch
-```
-4. In another terminal, watch compiled javascript
-```
-nodemon --max-old-space-size=2048 dist/index.js
+sudo npm install -g ts-node nodemon
+```
+
+2. Run the watcher
+
+> Note: You can find your npm global binary folder using `npm -g bin`, where nodemon will be installed.
+
+```
+nodemon src/index.ts --ignore cache/
 ```
 
-Everytime you save a backend `.ts` file, `tsc` will recompile it and genereate a new static `.js` file in the `dist` folder. `nodemon` will detect this new file and restart the node web server automatically.