folder structure booklore/config/mariadb should be booklore/mariadb/config

[fabiosirna]

According to the docker compose, in

https://github.com/booklore-app/booklore-docs/blob/master/docs/installation.md

# Create the main Booklore directory structure
mkdir -p ~/booklore/config/mariadb

should be

# Create the main Booklore directory structure
mkdir -p ~/booklore/mariadb/config

Same issue is

https://github.com/booklore-app/booklore-docs/blob/master/docs/installation.md#-directory-breakdown