doc: add info re: current images, ad a toc

README.md

@@ -4,9 +4,15 @@ A minimal image for running Linux CLI utilities - shell scripts and similar.
 This is useful for interactive purposes or as the basis for other utility
 images.
 
+* [Quickstart](#quickstart)
+* [More Info](#more-info)
+* [Available Images](#available-images)
+* [Helper Script](#helper-script)
+* [License](#license)
+
 ## Quickstart
 ```console
-$ docker run -ti --rm ghcr.io/jswank/alpine-cli
+$ docker run -ti --rm ghcr.io/jswank/alpine-cli:3
 ~ $ ^D
 exit
 
@@ -25,6 +31,13 @@ for the specifics.
   - A user is created with sudo (`-u root`) access. 
   - A few personal preferences are enabled via dotfiles.
 
+## Available Images
+
+See ghcr.io/jswank/alpine-cli for current available images.
+
+
+## Helper Script
+
 A helper script, using [casey/just](https://github.com/casey/just') is in
 [bin/cli](bin/cli). It can be used to quickly start an ephemeral (or
 persistent) container.