PATH variable in zsh (or bash) has been bedeviling y'all. See https://zcw.guru/kristofer/path-intro

things like docker: command not found are most likely, if you have installed Docker Desktop, 
because you haven't added the bin directory where all the docker command line programs are. 
There are two primary places Docker Desktop keeps its binaries (those pesky programs.) 
Where those programs are is dependent on wheter you check the System or User radio button in the Advanced Settings 
UI of the docker app.

Yep. It even tells us where they are.

If you use the System button, you have to add /usr/local/bin to your PATH

```
export PATH=/usr/local/bin:$PATH
```
if you clicked the User one, you'd need to have $HOME/.docker/bin in your PATH.

```
export PATH=$HOME/.docker/bin:$PATH
```
_Works for for both `BASH` and `ZSH` shells_

**This same idea is used to resolve command-not-found issues with the command line client programs of 
databases (like mysql and postgres)**