Man in the middle for the Client's various API Keys

[rdig]

This PR tracks introducing new proxy routes that will basically act as a man in the middle for the various API(s) that the client uses, in order to not expose those private, paid for keys on the client side

This needs to:

• introduce the required proxy routes (pinata, coingecko, bscscan, etherscan)
• introduce the required env variables here
• refactor the client with the new routes going through this proxy
• remove the unused env variables in the client
• remove the unused env variables in the docker file in the client