SasaRis

Part of #686 ________________________________ - [x] Stake with 32 ETH: [InApp Tutorial - Solo Staking.pdf](https://github.com/stereum-dev/ethereum-node/files/10001297/InApp.Tutorial.-.Solo.Staking.pdf) - [ ] SSV Network: [InApp Tutorial - SSV Network.pdf](https://github.com/stereum-dev/ethereum-node/files/10001355/InApp.Tutorial.-.SSV.Network.pdf) - [x] RPC Endpoint Connection:...