text: const { CronJob } = require("cron");
  const ms = require("ms");
  const db = require("./db");
  const { criticalChecks } = require("./checks/critical");
  const { verboseChecks } = require("./checks/verbose");
  
  // use this timezone to run all cron instances at the same time regardless of the server location
  const timezone = "UTC";
  
  // critical health checks job definition
  const criticalJobSchedule = "*/5 * * * *"; // on every 5 minute mark
  const criticalJobOnTick = async () => {
    const entry = {
      date: new Date().toISOString(),
      checks: await Promise.all(criticalChecks.map((check) => new Promise(check))),
    };
  
    // read before writing to make sure no external changes are overwritten
    db.read().get("critical").push(entry).write();
  };
  const criticalJob = new CronJob(criticalJobSchedule, criticalJobOnTick, null, false, timezone);
  
  // verbose health checks job definition
  const verboseJobSchedule = "0 * * * *"; // on every full hour mark
  const verboseJobOnTick = async () => {
    const entry = {
      date: new Date().toISOString(),
      checks: await Promise.all(verboseChecks.map((check) => new Promise(check))),
    };
  
    // read before writing to make sure no external changes are overwritten
    db.read().get("verbose").push(entry).write();
  };
  const verboseJob = new CronJob(verboseJobSchedule, verboseJobOnTick, null, false, timezone);
  
  // fire all health checks on startup (with delay for other services to boot)
  setTimeout(() => {
    // fire first run manually
    criticalJob.fireOnTick();
    verboseJob.fireOnTick();
  
    // start cron schedule
    criticalJob.start();
    verboseJob.start();
  }, ms("1 minute"));
  