message: Update contributing.md for exit code 137
  Error message when this happens can be unhelpful sometimes
diff: @@ -138,6 +138,8 @@ docker-compose build
  docker-compose up
  ```
  +**If a node process exits with exit code: 137** you may need to increase the default memory limit of docker containers
  +
  Finally, **if you're running into weird problems and nothing seems to be working**, run:
  ```bash
  