add reference ssl echo server using websockets and nginx reverse proxy to terminate ssl

test/compatibility/python/websockets/echo_server_interactive.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+# WS server example
+
+import asyncio
+import websockets
+
+async def hello(websocket, path):
+    await websocket.send(f"> Welcome !")
+
+    name = await websocket.recv()
+    print(f"< {name}")
+
+    greeting = f"Hello {name}!"
+
+    await websocket.send(greeting)
+    print(f"> {greeting}")
+
+async def echo(websocket, path):
+    msg = await websocket.recv()
+    print(f'Received {len(msg)} bytes')
+    await websocket.send(msg)
+
+print('Serving on localhost:8766')
+start_server = websockets.serve(echo, 'localhost', 8766)
+
+asyncio.get_event_loop().run_until_complete(start_server)
+asyncio.get_event_loop().run_forever()