Kumar Ashwin gives a presentation on securing containers from day one. The presentation covers what containers are, why we need them, the difference between virtual machines and containers, cgroups and namespaces, Docker basics, building optimized Docker images, and best practices for Dockerfile security. Some key points discussed include using minimal base images, ignoring unnecessary files, creating "golden images" as hardened base templates, not running as root, avoiding secrets in Dockerfiles, and using tools like Hadolint and Dockle to scan for issues.