Support WSS if https is used 

I found `ws` protocol hardcoded here
https://github.com/hyperledger/blockchain-explorer/blob/ff622e013d4c3f6c837c9b111b4e93dc306e6165/client/src/components/Header/HeaderView.js#L391

Is there a way to use `wss` for production?

Thank you in advance!