Update README

Author: stfnkth

routes_example_app/README.md

@@ -1,5 +1,19 @@
 # Routes Example App
 
+Run app:
+
 ```bash
+uv sync
+
+# source .venv/bin/activate
+
 gunicorn app:app -w 4 -k uvicorn.workers.UvicornWorker
-```
+```
+
+Build and run Docker image:
+
+```bash
+docker build -t shiny-for-py/routes-app:1.0.0 .
+
+docker run --rm -p 3333:3333 shiny-for-py/routes-app:1.0.0
+```