Yes, this was not very clear. These directories are to be added manually.
I added this text on p. 29 in Chapter 2, Building a Graph Store, section Listing:
“And we’ll also want to be able to access graphs and queries within any directories that we may add manually to our store.”
And on p. 47 in Chapter 3. Managing Graphs Natively with Elixir:
“In this case we have manually added an images/ directory.”
And on p. 49:
“And for better graph management note that we’ve manually added the dot/ and images/ directories in our graph store:”
Also I hadn’t been consistent in writing dot files to the dot/ directory. Fixed that too.