added python demo section

docs/python.md

@@ -0,0 +1,44 @@
+# Python Demo with Flask and Jinja
+
+![home screen](images/python/home_screen.png)
+
+An example Python Flask server is in the [python_server.py](https://github.com/theta360developers/oppkey-ricoh-viewer-demo-basic/blob/main/python_server.py)
+file.
+
+Python is an alternative to JavaScript on the backend.  If your
+backend infrascture uses JavaScript, you do not need to use Python.
+
+The backend can be built with any language.  Python is used to
+illustrate a simple example of using any backend framework.
+
+To run the Python demo, follow the step below.
+
+```text
+python -m venv venv
+source venv/bin/activate
+pip install -r requirements.txt
+python python_server.py
+```
+
+You will then need to open a web browser at the URL provided.
+
+```text
+python python_server.py
+ * Serving Flask app 'python_server'
+ * Debug mode: on
+WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:3000
+
+```
+
+## viewer token creation
+
+```python
+# Function to create a JWT token for the viewer API
+def create_token():
+    payload = {"client_id": CLIENT_ID}
+    token = jwt.encode(payload, PRIVATE_KEY, algorithm="RS256")
+    # Decode to UTF-8 if necessary
+
+    return token if isinstance(token, str) else token.decode("utf-8")
+```

mkdocs.yml

@@ -17,6 +17,7 @@ nav:
   - Features: features.md
   - Structure: structure.md
   - Contact: contact.md
+  - Python Flask: python.md
 
 plugins:
   - search