missing directories in soruce code + missing objects in hardhat

[kristiann57]

Hi, first of all thanks for sharing this code. However I am unable to replicate successful results as I encounter the following issues:

• Missing directories: in the file scripts/liquidation_bot/index.ts, there an import error as the project cannot find the following imports (line 3 to 6):
  import {
  CometInterface,
  OnChainLiquidator
  } from '../../build/types';

• 'hardhatConfig.networks' is possibly 'undefined'.ts(18048)
  I encounter this one in line 79 inside hardhat.config.ts

• Object literal may only specify known properties, and 'etherscan' does not exist in type 'HardhatUserConfig'.ts(2353)
  this one can be found in line 137 inside hardhat.config.ts

there are a few more but hopefully you can help

many thanks