Docker vs LXC

We don't have data for docker/docker, lxc/lxc yet. They will appear here as soon as the next sync run completes.

Docker is the default container runtime for app images. LXC is the Linux-native system container runtime. Docker wins for the app-image ecosystem; LXC wins for system containers that boot a full OS. Pick Docker for app workloads; pick LXC for lightweight VMs and system containers.