Leave the hello.py example in ...

As I'm struggling to get `uv run file` to work in any of the subfolders. Update README too.

Author: badlydrawnrob

building-with-fast-api/README.md

@@ -1,11 +1,18 @@
 # README
 
+## Chapters
+
+1. Hello World
+2. Routing
+
+
 ## Paradigms
 
 > I really don't understand Python's OOP style very much.
 
 Whereas Elm has a central `Model` (generally) to work from and uses modules and functions, Python has instances of classes which (I think) are stateful.
 
+
 ## Problems
 
 > These are annoying and compared to Elm (where everything just works), not particularly user-friendly. You'd think you could just run commands once you're set up with a `venv` (virtual environment).
@@ -18,6 +25,7 @@ Whereas Elm has a central `Model` (generally) to work from and uses modules and
 3. Using Thonny as an IDE
     - I can get the version of Python running but the other stuff is harder
 
+
 ## Tools
 
 You're going to need the following:

building-with-fast-api/hello.py

@@ -0,0 +1,6 @@
+def main():
+    print("Hello from building-with-fast-api!")
+
+
+if __name__ == "__main__":
+    main()