Err402 nginx P2PK locked ecash benchmark

https://github.com/DhananjayPurohit/ngx_l402

Client/Customers (left): Sending ecash locked to Servers Pubkey (simulating 32 tx/sec to nginx err402 endpoint)

Server (middle): Collecting ecash, once in a while redeem over lightning to the Providers LNURL (BOLT12 soon)

Provider (right): Get the earned sats via lightning

#soveng
@Sovereign Engineering
@Dhananjay Purohit
@calle