A lot of what is within this configuration file can be left at their defaults. I will just highlight some of the things you may want to change. You may want to edit the bind parameters. This tells the server which port and IP address to bind to. The default looks like this
You may also want to change the ServerAdmin email address for administrative alerts.
Another parameter of interest to you would be the DocumentRoot and Directory parameters. These represent the path to where your Intranet application will reside. If your application is to support .htaccess rules then the AllowOverride parameter should be set to All since the default is set to None. The DirectoryIndex parameter can be extended to add the file name you want to be served by default.
In most cases the parameters listed above are the only ones you may want to change while the rest can remain as their defaults. To access these parameters simply scroll through the configuration file and make appropriate changes as you come across the relevant parameters. The configuration file also gives additional comments on what each parameter does in case you want to experiment further.
The same configuration file layout and rules apply to all supported operating systems. Once changes have been made you will then need to restart your web server for it to pick up the changes.
There you have it. Simple instructions on how to setup web server on local intranet. As simple as flipping a switch.
You can follow this guide on how to set up an Intranet and also read this article on how HTML works to get you well on your way with your Intranet.