feat(daemon): auto-install Docker and initialize Swarm during daemon service setup

ts/classes/daemon.ts

@@ -46,6 +46,59 @@ export class OneboxDaemon {
     }
   }
 
+  /**
+   * Ensure Docker is installed, installing it if necessary
+   */
+  private async ensureDocker(): Promise<void> {
+    try {
+      const cmd = new Deno.Command('docker', {
+        args: ['--version'],
+        stdout: 'piped',
+        stderr: 'piped',
+      });
+      const result = await cmd.output();
+      if (result.success) {
+        const version = new TextDecoder().decode(result.stdout).trim();
+        logger.info(`Docker found: ${version}`);
+        return;
+      }
+    } catch {
+      // docker command not found
+    }
+
+    logger.info('Docker not found. Installing Docker...');
+    const installCmd = new Deno.Command('bash', {
+      args: ['-c', 'curl -fsSL https://get.docker.com | sh'],
+      stdin: 'inherit',
+      stdout: 'inherit',
+      stderr: 'inherit',
+    });
+    const installResult = await installCmd.output();
+    if (!installResult.success) {
+      throw new Error('Failed to install Docker. Please install it manually: curl -fsSL https://get.docker.com | sh');
+    }
+    logger.success('Docker installed successfully');
+
+    // Initialize Docker Swarm
+    logger.info('Initializing Docker Swarm...');
+    const swarmCmd = new Deno.Command('docker', {
+      args: ['swarm', 'init'],
+      stdout: 'piped',
+      stderr: 'piped',
+    });
+    const swarmResult = await swarmCmd.output();
+    if (swarmResult.success) {
+      logger.success('Docker Swarm initialized');
+    } else {
+      const stderr = new TextDecoder().decode(swarmResult.stderr);
+      if (stderr.includes('already part of a swarm')) {
+        logger.info('Docker Swarm already initialized');
+      } else {
+        logger.warn(`Docker Swarm init warning: ${stderr.trim()}`);
+      }
+    }
+  }
+
   /**
    * Install systemd service
    */
@@ -53,6 +106,9 @@ export class OneboxDaemon {
     try {
       logger.info('Installing Onebox daemon service...');
 
+      // Ensure Docker is installed
+      await this.ensureDocker();
+
       // Initialize smartdaemon if needed
       if (!this.smartdaemon) {
         this.smartdaemon = new plugins.smartdaemon.SmartDaemon();