dockcheck: A CLI Tool for Updating Container Images

dockcheck is a CLI tool that checks for Docker container image updates without pulling images first. It supports parallel processing, automatic updates, exclusion filters, and notifications via multiple channels (Matrix, Telegram). Configuration is handled through flags or a config file, with Docker Compose labels for fine-grained control. The tool can be scheduled via cron for automated update workflows, with options to delay updates until releases stabilize. Community contributions have added integrations for Prometheus, Zabbix, Unraid, and Synology DSM.