230515 Ruby 3.2 update and english auction fixes

What's Changed

• invoices with zero sum by @OlegPhenomenon in #74
• comment out timeout settings by @OlegPhenomenon in #71
• updated to ruby 3.2, fixed tests, updated dockerfiles by @OlegPhenomenon in #72
• added docs to billing system by @OlegPhenomenon in #53
• return an error for non existed invoice due one off generation by @OlegPhenomenon in #62

Full Changelog: 230420...230515