Given that SELinux ships by default on Fedora, RHEL, CentOS, and others, yet it is often poorly understood, it might be good to have a (mega) thread to bring visibility to issues and get support on this topic.
Feel free to post questions, answers, and resources.
SELinux introduction coloring book (no joke!): https://github.com/mairin/selinux-coloring-book
Dan Walsh’s presentations (most useful IMO): https://fedorapeople.org/~dwalsh/Presentations/
SELinux with Docker/containers: