We'll become more curious as we learn more about Docker. Mailing lists and IRC channels are the best places to get help, learn, and share knowledge about Docker. Docker has a few IRC channels on freenode.net such as, #docker and #docker-dev to discuss Docker in general and dev-related stuff, respectively. If you prefer Slack over IRC, there is also a Slack community, and you can sign up here: https://community.docker.com/network-groups.
While working on Docker, if you find any bugs, you can report them on GitHub at https://github.com/moby/moby/issues. Similarly, if you have fixed a bug, you can send the pull request, which will get reviewed and then get merged to the code base.
Docker also has a forum and YouTube channel, which are great learning resources as well, at https://forums.docker.com and https://www.youtube.com/user/dockerrun, respectively.
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