chore: sync backend and deployment changes

scripts/serve-app-dist.mjs

@@ -25,6 +25,53 @@ const mimeTypes = {
   '.woff2': 'font/woff2',
 };
 
+function canListenOnPort(candidatePort, host = '0.0.0.0') {
+  return new Promise((resolve, reject) => {
+    const probeServer = createServer();
+
+    probeServer.once('error', (error) => {
+      probeServer.close(() => {
+        if (error && typeof error === 'object' && 'code' in error && error.code === 'EADDRINUSE') {
+          resolve(false);
+          return;
+        }
+
+        reject(error);
+      });
+    });
+
+    probeServer.once('listening', () => {
+      probeServer.close((closeError) => {
+        if (closeError) {
+          reject(closeError);
+          return;
+        }
+
+        resolve(true);
+      });
+    });
+
+    probeServer.listen(candidatePort, host);
+  });
+}
+
+async function findAvailablePort(initialPort, host = '0.0.0.0', maxAttempts = 20) {
+  for (let offset = 0; offset < maxAttempts; offset += 1) {
+    const candidatePort = initialPort + offset;
+    const available = await canListenOnPort(candidatePort, host);
+
+    if (available) {
+      return candidatePort;
+    }
+
+    if (offset === 0) {
+      console.warn(`Port ${initialPort} is in use, trying another one...`);
+    }
+  }
+
+  throw new Error(`No available port found from ${initialPort} to ${initialPort + maxAttempts - 1}.`);
+}
+
 function resolveCacheControl(resolvedPath, extension) {
   const normalizedPath = resolvedPath.replace(/\\/g, '/');
 
@@ -218,6 +265,9 @@ server.on('upgrade', (request, socket, head) => {
   });
 });
 
-server.listen(port, '0.0.0.0', () => {
-  console.log(`${distDirName} server listening on http://0.0.0.0:${port}`);
+const host = '0.0.0.0';
+const resolvedPort = await findAvailablePort(port, host);
+
+server.listen(resolvedPort, host, () => {
+  console.log(`${distDirName} server listening on http://${host}:${resolvedPort}`);
 });