TODO
- auto refresh task completion
- validate cron string
- clone task
- delete task
- list option: sort
- list option: show last completion
- list option: show next refresh
- list option: move completed below
- list option: hide completed
- options in cookies
- Empty list message
- change lang
- toasts
- handle errors
- list per URL
- home screen
- share link
- lang in cookies
- Dockerfile
- html cards
- custom background
- favicon
- README