Include notes on bat-extras, ripgrep, and aliases in README

Author: somewatson

README.md

@@ -1,7 +1,17 @@
 # Bat - Docker mod for code-server
 
-This mod adds bat to code-server, to be installed/updated during container start.
+This mod adds [bat](https://github.com/sharkdp/bat) to code-server, to be installed/updated during container start.
+
+Bat is a cat(1) clone with syntax highlighting and Git integration.
 
 In code-server docker arguments, set an environment variable `DOCKER_MODS=somewatson/mods:code-server-bat`
 
-If adding multiple mods, enter them in an array separated by `|`, such as `DOCKER_MODS=somewatson/mods:code-server-bat|linuxserver/mods:openssh-server-mod2`
+If adding multiple mods, enter them in an array separated by `|`, such as `DOCKER_MODS=somewatson/mods:code-server-bat|linuxserver/mods:openssh-server-mod2`
+
+### Bat-extras and Ripgrep
+
+This mod also includes [bat-extras](https://github.com/eth-p/bat-extras) which has a dependency of [ripgrep](https://github.com/BurntSushi/ripgrep). Ripgrep has also been included because it is a requirment of bat-extras.
+
+### Aliases
+
+This mod includes aliases for `bat` in `bash` and `zsh`. Under Ubuntu `bat` gets installed as `batcat` to avoid a name collision. So, for convenience, an alias to set `bat="batcat"` is included for both `bash` and `zsh`.