Add commands from the demo gif to the README.md as text (#57)

* Add commands from the demo gif to the README.md as text

Trying to copy the commands while the commands scroll out of view is a bit tedious so the commands have been added in text form below the demo video.

* Apply suggestions from code review

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Co-authored-by: Ofek Lev <ofekmeister@gmail.com>

README.md

@@ -13,6 +13,8 @@ PyApp is a wrapper for Python applications that bootstrap themselves at runtime.
 
 <img src="https://raw.githubusercontent.com/ofek/pyapp/master/docs/assets/images/example.gif" alt="PyApp example workflow" role="img">
 
+See the [how-to](https://ofek.dev/pyapp/latest/how-to/) for a detailed example walkthrough.
+
 ## Features
 
 - Easily build standalone binaries for every platform