add nodePort to DeployContract

[nimakaviani]

• allows to determine from the service plan which port the blockchain node is listening on

  • [x] document your feature
  • [x] comment your code
  • [x] update the README / how-to-run
  • [x] have tests
  • [x] get reviews

[cfdreddbot]

:white_check_mark: Hey nimakaviani! The commit authors and yourself have already signed the CLA.