The recent meetup focused on building microservices using Node.js and Docker, where participants were shown how to create Docker images using Dockerfile and the 'docker build' command. The session also delved into Docker's layering and caching mechanisms, providing insights on optimizing the image build process. Attendees were introduced to the new Docker toolbox available online, and they are encouraged to share comments or questions via email or by joining future sessions at the Containers 101 online meetup. Slides from the presentation were also made available to the attendees.