README: improve it for newcomers

"kconfigs" -> "Linux kernel configuration files".

Add a section describing how to clone the gh-pages branch and browse the
configs locally.

Update the "how to run" section to describe the requirements for non
Oracle Linux systems -- the packages should be easy to install.

Signed-off-by: Stephen Brennan <[email protected]>

README.md

@@ -1,18 +1,33 @@
 # kconfigs
 
-This is a system for fetching the kconfigs for a variety of Linux distributions,
-as well as the upstream defconfigs, and archiving them for later analysis. The
-resulting configuration data can be summarized into a compact JSON file which
-can be browsed on [our webpage][1]. Or, you can simply download the
-configurations and explore them with `grep`.
+This is a system for fetching the Linux kernel configuration files for a variety
+of Linux distributions, and archiving them for later analysis. The resulting
+configuration data is summarized into a compact JSON file which can be
+browsed on [our webpage][1]. Or, you can simply download the configurations and
+explore them with `grep`.
 
 [1]: https://oracle.github.io/kconfigs/
 
 On a regular basis, Github CI runs will fetch more recent package versions and
 keep the configurations up-to-date.
 
+## Browsing Configurations Locally
+
+While the [webpage][1] is convenient, you can also directly clone the `gh-pages`
+branch of this repository to explore locally:
+
+``` sh
+git clone https://github.com/oracle/kconfigs -b gh-pages
+cd kconfigs
+grep -r IKCONFIG_PROC out/
+```
+
 ## How to Run
 
+This tool runs on Python 3.11 or later. It requires common compression tools
+(gzip, bzip2, xz, zstd, tar) as well as common command line tools for Linux
+packaging installed to the system (gpg, rpm, cpio, dpkg).
+
 The following setup instructions apply to Oracle Linux 9. First, install runtime
 dependencies (most should already be installed, but they are listed for
 completeness).
@@ -27,6 +42,8 @@ dnf install -y python3.11{,-devel,-venv,-pip} \
 To setup the runtime Python environment:
 
 ``` sh
+git clone https://github.com/oracle/kconfigs
+cd kconfigs
 make venv
 ```
 
@@ -36,6 +53,8 @@ To run the extraction routine:
 make run
 ```
 
+Configurations will appear in the `out` directory.
+
 ## Documentation
 
 You should be able to find everything you need by browsing to our [web page][1]