The file to edit is
hue.ini (wich is based on this template) and the actual values used can be checked on the Dump Config page.
The most important sections to configure are about the:
- Hue service. e.g. pointing the application to a relational database where Hue saves users and queries, selecting the login method, customizing the look & feel, activating the task server service…
- Connectors. e.g. pointing to Data Warehouse services you want to make easy to query or browse. Those are typically which databases we want users to query with SQL or filesystems to browse.