fix examples for freeze_support() issue on windows (#2741)

Co-authored-by: Adam Hopkins <adam@amhopkins.com>

examples/amending_request_object.py

@@ -25,5 +25,5 @@ def key_exist_handler(request):
 
     return text("num does not exist in request")
 
-
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000, debug=True)

examples/blueprint_middlware_execution_order.py

@@ -50,4 +50,5 @@ def pop_handler(request):
 
 app.blueprint(bp, url_prefix="/bp")
 
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000, debug=True, auto_reload=False)

examples/blueprints.py

@@ -37,4 +37,5 @@ app.blueprint(blueprint)
 app.blueprint(blueprint2)
 app.blueprint(blueprint3)
 
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=9999, debug=True)

examples/http_redirect.py

@@ -69,5 +69,5 @@ async def runner(app: Sanic, app_server: AsyncioServer):
         app.is_running = False
         app.is_stopping = True
 
-
+if __name__ == "__main__":
     https.run(port=HTTPS_PORT, debug=True)

examples/limit_concurrency.py

@@ -39,4 +39,5 @@ async def test(request):
         return json(response)
 
 
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000, workers=2)

examples/override_logging.py

@@ -20,4 +20,5 @@ def test(request):
     return text("hey")
 
 
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000)

examples/request_timeout.py

@@ -20,4 +20,5 @@ def timeout(request, exception):
     return response.text("RequestTimeout from error_handler.", 408)
 
 
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000)

examples/run_async_advanced.py

@@ -35,7 +35,7 @@ async def after_server_stop(app, loop):
 async def test(request):
     return response.json({"answer": "42"})
 
-
+if __name__ == "__main__":
     asyncio.set_event_loop(uvloop.new_event_loop())
     serv_coro = app.create_server(
         host="0.0.0.0", port=8000, return_asyncio_server=True