George Kalpakas 021f4344b1 fix(docs-infra): fix preview server periodic clean-up (#25671)
Includes the following fixes:

- Fix cron entry format for clean-up script.
  Crontabs in `/etc` should not have a user field. No idea why it used
  to work before, but it started giving errors recently:
  `/bin/sh: root: not found`.

- Set required env variable in clean-up script. (Broken in cc6f36a9d.)
  This was producing the following error:
  `ERROR: Missing required environment variable 'AIO_CIRCLE_CI_TOKEN'!`

- Use the correct path for downloads to be removed. (Broken in cc6f36a9d.)

PR Close #25671
2018-09-26 15:26:19 -07:00

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# Periodically clean up builds that do not correspond to currently open PRs
0 12 * * * /usr/local/bin/aio-clean-up >> /var/log/cron.log 2>&1