Check if own node is testnet or mainnet

[Arpanjainson]

App allows setting http://35.178.186.16 port 80 which is a testnet wrapper as own node in staging app.
A check should be in place to verify it is main-net node.

[Parsh]

We would need an additional endpoint on the wrapper which could relay blockchain-info in order to identify the network. I was not able to find any network information in the current set of Esplora endpoints. cc @Varunram

[Varunram]

Will create a new endpoint and PR on Friday

[Varunram]

bithyve/bithyve-wrapper#30