[FEATURE] Document third-party node services for Tron, Monero, Ethereum
**Is your feature request related to a problem? Please describe.**

It was not clear for me which software is used as a XMR node. I spent considerable time looking in the source, docker files, and commits, and made a docker deployment test, just to understand that there's no software, and the following third-party servers are used:

* Monero: [node.sethforprivacy.com](https://github.com/bitcart/bitcart-docker/blob/546a9ae75ebd53ab7a0c0d15d5acc89c29e8e400/generator/docker-components/monero.yml#L7)
* Ethereum: [mainnet.infura.io](https://github.com/bitcart/bitcart-docker/blob/546a9ae75ebd53ab7a0c0d15d5acc89c29e8e400/generator/docker-components/ethereum.yml#L7C41-L7C58)
* Tron: [rpc.ankr.com](https://github.com/bitcart/bitcart-docker/blob/546a9ae75ebd53ab7a0c0d15d5acc89c29e8e400/generator/docker-components/tron.yml#L7)
* Polygon: [polygon-mainnet.infura.io](https://github.com/bitcart/bitcart-docker/blob/546a9ae75ebd53ab7a0c0d15d5acc89c29e8e400/generator/docker-components/polygon.yml#L7)
