|  | @@ -25,6 +25,10 @@ let availCache = {}
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				|  |  |  cron.schedule('* */12 * * *', () => {
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				|  |  |      availCache = {}
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				|  |  |  })
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				|  |  | +cron.schedule('*/30 * * * *', () => {
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				|  |  | +    db.prepare("SELECT 1");
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				|  |  | +
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				|  |  | +})
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				|  |  |  
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				|  |  |  const transporter = nodemailer.createTransport({
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				|  |  |      host: 'smtp.qq.com', port: 465, secure: true, auth: {
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