docs: def update_base_image(path: str):
      """Pulls the latest version of the base image"""
      with open(path, 'r') as file_handle:
          contents = file_handle.read()
  
      regex = re.compile('from\s+(?P<source>[^\s]+)', re.IGNORECASE)
      matches = regex.findall(contents)
  
      if not matches:
          return None
  
      match = matches[0]
      os.system('docker pull {}'.format(match))
      return match