sTeam Server Wiki
You can find some wiki documents about the server (technical and administration issues).
Configure a sTeam Server
A steam server can be configured through the web interface or using the steam config file. After installation only the config file is directly available to the admin. Especially, the database connection and some basic ports are defined in the steam config file.
Configuration Directory
The steam configuration directory is usually /etc/steam, but can be configured to point to any directory. The server start script uses --config-dir=directory as an option to modify this directory.