Refactor: Initial code split into includes directory for modularity

- Reorganized backend logic by moving API, authentication, Docker, status, and WebSocket handling into separate modules (api.js, auth.js, docker.js, status.js, websocket.js) within ./includes/
- Converted codebase to ES modules with import/export syntax for modern JavaScript
- Updated index.js to serve as main entry point, importing from ./includes/
- Reduced code duplication and improved readability with modularized functions
- Ensured full functionality preservation, including Docker stats and WebSocket communication
- Updated README to reflect new folder structure and ES module setup

includes/status.js

@@ -0,0 +1,49 @@
+import { promisify } from 'util';
+import { exec } from 'child_process';
+import { Socket } from 'net';
+const execPromise = promisify(exec);
+
+export async function checkConnectionStatus(hostname, port) {
+  try {
+    const { stdout, stderr } = await execPromise(`${process.env.STATUS_CHECK_PATH} -host ${hostname} -port ${port}`);
+    if (stderr) return { isOnline: false, error: stderr };
+    return { isOnline: true, data: JSON.parse(stdout) };
+  } catch (error) {
+    return { isOnline: false, error: error.message };
+  }
+}
+
+export async function checkGeyserStatus(hostname, port) {
+  try {
+    const { stdout, stderr } = await execPromise(`${process.env.GEYSER_STATUS_CHECK_PATH} -host ${hostname} -port ${port}`);
+    if (stderr) return { isOnline: false, error: stderr };
+    return { isOnline: true, data: JSON.parse(stdout) };
+  } catch (error) {
+    return { isOnline: false, error: error.message };
+  }
+}
+
+export async function checkSftpStatus(hostname, port) {
+  return new Promise((resolve) => {
+    const socket = new Socket();
+    const timeout = parseInt(process.env.SFTP_CONNECTION_TIMEOUT_MS, 10);
+    socket.setTimeout(timeout);
+
+    socket.on('connect', () => {
+      socket.destroy();
+      resolve({ isOnline: true });
+    });
+
+    socket.on('timeout', () => {
+      socket.destroy();
+      resolve({ isOnline: false, error: 'Connection timed out' });
+    });
+
+    socket.on('error', (error) => {
+      socket.destroy();
+      resolve({ isOnline: false, error: error.message });
+    });
+
+    socket.connect(port, process.env.SFTP_HOSTNAME);
+  });
+}