fig_05, fig_07: Lack of prebuilt Docker container

[n0toose]

For fig_05 and fig_07, a base Dockerfile definition is provided under experiments/fig_05_syscall-heatmap/dockerfiles/base. Although you have published a series of prebuilt Docker containers that ensure some degree of reproducibility in the case that building a Docker container "from source" becomes impossible (#3), this may have been forgotten in this case, as no such container exists.