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// configuration.ts  onReady
      this.app.use(async (ctx, next) => {
        if (!ctx.path.startsWith('/api')) {
          ctx.status = 404;
          ctx.set('Content-Type', 'text/html; charset=utf-8');
          ctx.body = '<h1>404 Not Found...</h1>';
          return;
        } else {
          ctx.path = ctx.path.replace('/api', '');
        }
        await next();
      });

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