Safely change laravel root domain from `/` to `/public` folder after deployment in production.

RouteServiceProvider.php

<?php
...
use Illuminate\Support\Facades\Http;
use Route;
use Illuminate\Http\Request;

class RouteServiceProvider extends ServiceProvider
{
     ...
     public function boot()
    {
        $this->configureRateLimiting();

        $this->routes(function () {
            Route::middleware('web')
                ->group(base_path('routes/web.php'));

            Route::prefix('api')
                ->middleware('api')
                ->group(base_path('routes/api.php'));

            // handle apps using old api path
            Route::any('public/api/{any}', function (Request $request) {
                // remove public from path
                $paths = explode('/', $request->path());
                $path = implode('/', array_slice($paths, 1));
                 
                // update request with new path
                $request->server->set('REQUEST_URI', $path);
                $request->server->set('PATH_INFO', $path);
                 
                // handle as a new request
                return app()->handle($request);
              })
              ->middleware('api')
              ->where('any', '.*');
        });
    }
  ...