Make paths customizeable

There are a lot of places in the app that have hardcoded paths, a big blob of these exist inside https://github.com/1602/compound/blob/master/lib/compound.js

If possible I want my app-folder to be called "server" and also put the config-folder inside the app(server)-folder.

The main file to examine is lib/compound.js, which contains many hardcoded paths. Start by identifying all path references in that file and understanding how they are used. Determine where configuration for paths should be centralized, likely in a config file or environment variables. Check if there are existing tests for path handling to ensure changes don't break functionality.

索引モデルが issue の本文から書いたものです。