Add basic express app

Author: stfnkth

README.md

@@ -1,5 +1,9 @@
 # Shiny for Python Getting Started
 
+## Start from scratch
+
+Create a Python Shiny environment:
+
 ```bash
 uv init [-p 3.9]
 uv add shiny
@@ -13,3 +17,14 @@ shiny --help
 shiny create --help
 ```
 
+Create a new Shiny Express app from template:
+
+```bash
+shiny create -d basic_app -t basic-app -m express
+
+shiny run basic_app/app.py
+```
+
+## Templates
+
+* [posit-dev/py-shiny-templates](https://github.com/posit-dev/py-shiny-templates)

basic_app/app.py

@@ -0,0 +1,10 @@
+from shiny import render, ui
+from shiny.express import input
+
+ui.panel_title("Hello Shiny!")
+ui.input_slider("n", "N", 0, 100, 20)
+
+
+@render.text
+def txt():
+    return f"n*2 is {input.n() * 2}"