Merge branch origin/copilot/sub-pr-5 into main

scripts/serve.js

@@ -10,6 +10,17 @@ const child = spawn('docusaurus', args, {
   shell: true
 });
 
-child.on('exit', (code) => {
+child.on('error', (err) => {
-  process.exit(code);
+  console.error('Failed to start docusaurus:', err.message);
+  process.exit(1);
+});
+process.on('SIGINT', () => {
+  child.kill('SIGINT');
+});
+
+process.on('SIGTERM', () => {
+  child.kill('SIGTERM');
+});
+child.on('exit', (code) => {
+  process.exit(code || 1);
 });