refactor: parse PUBLIC_PATH for CDN support

Author: dcoa

src/config.js

@@ -126,7 +126,7 @@
 import { APP_CONFIG_INITIALIZED, CONFIG_CHANGED } from './constants';
 
 import { publish, subscribe } from './pubSub';
-import { ensureDefinedConfig } from './utils';
+import { ensureDefinedConfig, getPath } from './utils';
 
 function extractRegex(envVar) {
   // Convert the environment variable string to a regex, while guarding
@@ -143,7 +143,7 @@ let config = {
   ACCOUNT_PROFILE_URL: process.env.ACCOUNT_PROFILE_URL,
   ACCOUNT_SETTINGS_URL: process.env.ACCOUNT_SETTINGS_URL,
   BASE_URL: process.env.BASE_URL,
-  PUBLIC_PATH: process.env.PUBLIC_PATH || '/',
+  PUBLIC_PATH: getPath(process.env.PUBLIC_PATH) || '/',
   CREDENTIALS_BASE_URL: process.env.CREDENTIALS_BASE_URL,
   CSRF_TOKEN_API_PATH: process.env.CSRF_TOKEN_API_PATH,
   DISCOVERY_API_BASE_URL: process.env.DISCOVERY_API_BASE_URL,