Restore Zimfarm sisyphus worker

Restoring a Zimfarm worker from a new bare VM consists in following steps:

• setup the machine as described in the generic procedure
• setup the worker as described in the generic procedure
  • including installation of Docker CE
  • few special stuff for /etc/zimfarm.config:
    • ZIMFARM_USERNAME="sisyphus"
    • ZIMFARM_OFFLINERS=""
    • ZIMFARM_SELFISH="y"
    • WEB_API_URIS="https://api.farm.zimit.kiwix.org/v1,https://api.farm.openzim.org/v1"
    • specify proper settings for CPU/RAM/Disk depending on the VM characteristics and current task settings in zimit-frontend:
    • as of Oct. 2024:
      • ZIMFARM_MAX_RAM="15GiB"
      • ZIMFARM_DISK="200GiB"
      • ZIMFARM_CPU="4"
• if the worker IP has changed, update ZimitWorker policy in Wasabi console for proper uploads to S3