feat(devops): add Serve with project mounting

Mounts project via SSHFS and runs auto-detected dev server.
Supports Laravel, Node.js, PHP, Go, Python projects.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pkg/devops/serve.go

@@ -0,0 +1,107 @@
+package devops
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+)
+
+// ServeOptions configures the dev server.
+type ServeOptions struct {
+	Port int    // Port to serve on (default 8000)
+	Path string // Subdirectory to serve (default: current dir)
+}
+
+// Serve mounts the project and starts a dev server.
+func (d *DevOps) Serve(ctx context.Context, projectDir string, opts ServeOptions) error {
+	running, err := d.IsRunning(ctx)
+	if err != nil {
+		return err
+	}
+	if !running {
+		return fmt.Errorf("dev environment not running (run 'core dev boot' first)")
+	}
+
+	if opts.Port == 0 {
+		opts.Port = 8000
+	}
+
+	servePath := projectDir
+	if opts.Path != "" {
+		servePath = filepath.Join(projectDir, opts.Path)
+	}
+
+	// Mount project directory via SSHFS
+	if err := d.mountProject(ctx, servePath); err != nil {
+		return fmt.Errorf("failed to mount project: %w", err)
+	}
+
+	// Detect and run serve command
+	serveCmd := DetectServeCommand(servePath)
+	fmt.Printf("Starting server: %s\n", serveCmd)
+	fmt.Printf("Listening on http://localhost:%d\n", opts.Port)
+
+	// Run serve command via SSH
+	return d.sshShell(ctx, []string{"cd", "/app", "&&", serveCmd})
+}
+
+// mountProject mounts a directory into the VM via SSHFS.
+func (d *DevOps) mountProject(ctx context.Context, path string) error {
+	absPath, err := filepath.Abs(path)
+	if err != nil {
+		return err
+	}
+
+	// Use reverse SSHFS mount
+	// The VM connects back to host to mount the directory
+	cmd := exec.CommandContext(ctx, "ssh",
+		"-o", "StrictHostKeyChecking=no",
+		"-o", "UserKnownHostsFile=/dev/null",
+		"-o", "LogLevel=ERROR",
+		"-R", "10000:localhost:22", // Reverse tunnel for SSHFS
+		"-p", "2222",
+		"root@localhost",
+		fmt.Sprintf("mkdir -p /app && sshfs -p 10000 %s@localhost:%s /app -o allow_other", os.Getenv("USER"), absPath),
+	)
+	return cmd.Run()
+}
+
+// DetectServeCommand auto-detects the serve command for a project.
+func DetectServeCommand(projectDir string) string {
+	// Laravel/Octane
+	if hasFile(projectDir, "artisan") {
+		return "php artisan octane:start --host=0.0.0.0 --port=8000"
+	}
+
+	// Node.js with dev script
+	if hasFile(projectDir, "package.json") {
+		if hasPackageScript(projectDir, "dev") {
+			return "npm run dev -- --host 0.0.0.0"
+		}
+		if hasPackageScript(projectDir, "start") {
+			return "npm start"
+		}
+	}
+
+	// PHP with composer
+	if hasFile(projectDir, "composer.json") {
+		return "frankenphp php-server -l :8000"
+	}
+
+	// Go
+	if hasFile(projectDir, "go.mod") {
+		if hasFile(projectDir, "main.go") {
+			return "go run ."
+		}
+	}
+
+	// Python Django
+	if hasFile(projectDir, "manage.py") {
+		return "python manage.py runserver 0.0.0.0:8000"
+	}
+
+	// Fallback: simple HTTP server
+	return "python3 -m http.server 8000"
+}