apache proxy tunnel to forward ws to wss

I have a website which is ssl enabled but the site is being blocked by major browsers for mix content <Error Message> Mixed Content: The page at '<URL>' was loaded over HTTPS, but attempted to connect to the insecure WebSocket endpoint 'ws:<URL>/websocket'. This request has been blocked; this endpoint must be available over WSS. </Error Message> So we need to setup a proxy tunnel, to forward ws request to wss its Apache2 webserver on ubuntu16