init: 初始化 AssetX 项目仓库

包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、
antdesign（管理后台）、landingpage（营销落地页）、
数据库 SQL 和配置文件。

webapp/scripts/start-with-port.js

@@ -0,0 +1,84 @@
+const { spawn } = require('child_process');
+const net = require('net');
+
+const DEFAULT_PORT = 3000;
+const MAX_PORT = 3020;
+
+function checkPort(port) {
+  return new Promise((resolve) => {
+    const server = net.createServer();
+
+    server.once('error', (err) => {
+      if (err.code === 'EADDRINUSE') {
+        resolve(false);
+      } else {
+        resolve(false);
+      }
+    });
+
+    server.once('listening', () => {
+      server.close();
+      resolve(true);
+    });
+
+    server.listen(port, '0.0.0.0');
+  });
+}
+
+async function findAvailablePort(startPort = DEFAULT_PORT) {
+  for (let port = startPort; port <= MAX_PORT; port++) {
+    const isAvailable = await checkPort(port);
+    if (isAvailable) {
+      return port;
+    }
+  }
+  throw new Error(`No available port found between ${startPort} and ${MAX_PORT}`);
+}
+
+async function startServer() {
+  try {
+    const port = await findAvailablePort(DEFAULT_PORT);
+
+    if (port !== DEFAULT_PORT) {
+      console.log(`Port ${DEFAULT_PORT} is in use, using port ${port} instead`);
+    } else {
+      console.log(`Starting server on port ${port}`);
+    }
+
+    const args = process.argv.slice(2);
+    const command = args[0] || 'next';
+    const commandArgs = args.slice(1);
+
+    const child = spawn(command, [...commandArgs, '-p', String(port), '-H', '0.0.0.0'], {
+      stdio: 'inherit',
+      shell: true,
+      env: {
+        ...process.env,
+        PORT: String(port)
+      }
+    });
+
+    child.on('error', (error) => {
+      console.error('Failed to start server:', error);
+      process.exit(1);
+    });
+
+    child.on('exit', (code) => {
+      process.exit(code || 0);
+    });
+
+    process.on('SIGINT', () => {
+      child.kill('SIGINT');
+    });
+
+    process.on('SIGTERM', () => {
+      child.kill('SIGTERM');
+    });
+
+  } catch (error) {
+    console.error('Error:', error.message);
+    process.exit(1);
+  }
+}
+
+startServer();