message: chore: .env.example DB credentials [skip-ci]
diff: # ------- REQUIRED --------- #
  MODE=dev
  +#DB credentials
  +DB_USERNAME=postgres
  +DB_PASSWORD=postgres
  +DB_HOST=localhost
  +DB_PORT=5432
  +DB_DATABASE=origin
  +
  # URLs
  # You can add multiple WEB3 nodes, separated by a semilcolon ';'. e.g. WEB3=http://localhost:8545;http://localhost:8550
  WEB3=http://localhost:8545
  