fix: update dev server config for new endpoint and flexibility

Rename mfe_config endpoint to frontend_site_config, use relative URLs
in site configs, and bind dev server to 0.0.0.0 for broader compatibility.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: arbrandes

shell/site.config.dev.tsx

@@ -43,7 +43,7 @@ const siteConfig: SiteConfig = {
 
   // API URLs
   lmsBaseUrl: 'http://local.openedx.io:8000',
-  runtimeConfigJsonUrl: 'http://apps.local.openedx.io:8080/api/mfe_config/v1',
+  runtimeConfigJsonUrl: '/api/frontend_site_config/v1/',
 };
 
 export default siteConfig;

test-site/site.config.build.tsx

@@ -13,7 +13,7 @@ const siteConfig: SiteConfig = {
   logoutUrl: 'http://local.openedx.io:8000/logout',
 
   environment: EnvironmentTypes.PRODUCTION,
-  runtimeConfigJsonUrl: 'http://apps.local.openedx.io:8080/api/mfe_config/v1',
+  runtimeConfigJsonUrl: '/api/frontend_site_config/v1/',
   apps: [
     shellApp,
     headerApp,

test-site/site.config.dev.tsx

@@ -13,7 +13,7 @@ const siteConfig: SiteConfig = {
   logoutUrl: 'http://local.openedx.io:8000/logout',
 
   environment: EnvironmentTypes.DEVELOPMENT,
-  runtimeConfigJsonUrl: 'http://apps.local.openedx.io:8080/api/mfe_config/v1',
+  runtimeConfigJsonUrl: '/api/frontend_site_config/v1/',
   apps: [
     shellApp,
     headerApp,

tools/webpack/common-config/dev/getDevServer.ts

@@ -13,12 +13,12 @@ export default function getDevServer(): Configuration {
       index: path.join(getPublicPath(), 'index.html'),
       disableDotRule: true,
     },
-    host: 'apps.local.openedx.io',
+    host: '0.0.0.0',
     hot: true,
     port: process.env.PORT ?? 8080,
     proxy: [
       {
-        context: ['/api/mfe_config/v1'],
+        context: ['/api/frontend_site_config/v1'],
         target: 'http://local.openedx.io:8000',
         changeOrigin: true,
       }