(feat) Update dotfile scripts & tooling

- Update & split scripts
- Main package install script
- Fish / environment install script
- Dockerfile for testing locally

README.md

@@ -11,6 +11,13 @@ T31M Dotfiles Repository
 ### Contents ###
 * FiSH Shell Setup & Configuration
   * Theme/Prompt Based heavily on: omf/theme-sushi check it out
-  * NVM + NVM FiSH support
+  * NVM + Pyenv / PipX / AWS FiSH support
   * edc/bass
   * fzf
+
+### Test in Docker
+
+There are some runtime issues due to mounting of .git folder when executing container for test installation !
+
+* `docker build --build-arg USER=*your user* -t fish-test .`
+* `docker run --rm -it -v (pwd):/app --mount type=volume,dst=/app/.git --name fish-test fish-test`