In this task, the job is to create a new empty file called "output.txt" of size 0 bytes
and an empty directory called "docs". This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.

L(directory) [‘/’, ‘./’]
   File(directory‘output.txt’, ‘w’) // create /output.txt, then ./output.txt
   fs:create_dir(directory‘docs’)   // create directory /docs, then ./docs