In some cases you do not want to install something directly on your OS, because it can create caches, hidden directories, etc. and you will loose track of it
OS: Linux
To install:
git clone https://github.com/skibish/dockerized.git $HOME/dockerized
And add it to your path in .<bash|zsh|etc>rc file:
# You need to prepend it to path to overwrite what you have in your path
export PATH=$HOME/dockerized/bin:$PATH
# Or, to just add new functionality, add this
export PATH=$PATH:$HOME/dockerized/bin