Update readme for production build/start

Author: calvinl

README.md

@@ -24,6 +24,12 @@ yarn start
 
 Direct your browser to `http://localhost:3000`.
 
+For production builds:
+
+```
+yarn run prod:start
+```
+
 ## Directory Structure
 ```
 ├── client                         # Client-side code

package.json

@@ -19,7 +19,7 @@
     "dev:start:client": "better-npm-run dev:start:client",
     "dev:build": "better-npm-run dev:build",
     "prod:build": "better-npm-run prod:build",
-    "prod:start": "better-npm-run prod:start ",
+    "prod:start": "better-npm-run prod:build && better-npm-run prod:start ",
     "test": "better-npm-run test",
     "test:all": "better-npm-run test:all",
     "test:watch": "better-npm-run test:watch",