added docker compose file

[John-Richardson]

[!NOTE] Adds docker-compose.yml defining a jottacloud service with env vars and volume mounts for backups using bluet/jottacloud.

• Docker Compose:
  • Adds docker-compose.yml with jottacloud service (container_name: jottacloud-cli).
  • Configures environment variables: JOTTA_TOKEN, JOTTA_DEVICE, JOTTA_SCANINTERVAL, LOCALTIME.
  • Mounts volumes for data/config (./:/data/jottad, ./.ignore, ./jottad.env) and backup source (/home/ -> /backup/home).
  • Uses image bluet/jottacloud.

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Summary by CodeRabbit

Release Notes

• Chores
  • Added Docker Compose configuration for streamlined deployment and development. Includes a pre-configured service with support for environment-based customization, volume mappings for data and backup directories, automated scanning intervals, and timezone settings for quick setup.

[bluet]

Thanks for the PR @John-Richardson

Could you move those settings into .env (and provide a example.env)? Thanks!