vito/app/Http/Middleware/ServerIsReadyMiddleware.php

<?php

namespace App\Http\Middleware;

use App\Models\Server;
use Closure;
use Illuminate\Http\Request;

class ServerIsReadyMiddleware
{
    public function handle(Request $request, Closure $next)
    {
        /** @var Server $server */
        $server = $request->route('server');

        if (! $server->isReady()) {
            return redirect()->route('servers.show', ['server' => $server]);
        }

        return $next($request);
    }
}