Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "/home/myname/Projects/projectname/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/myname/Projects/projectname/lib/python3.7/site-packages/django/core/management/__init__.py", line 325, in execute
    settings.INSTALLED_APPS
  File "/home/myname/Projects/projectname/lib/python3.7/site-packages/django/conf/__init__.py", line 79, in __getattr__
    self._setup(name)
  File "/home/myname/Projects/projectname/lib/python3.7/site-packages/django/conf/__init__.py", line 66, in _setup
    self._wrapped = Settings(settings_module)
  File "/home/myname/Projects/projectname/lib/python3.7/site-packages/django/conf/__init__.py", line 157, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/myname/Projects/projectname/projectname/projectname/settings.py", line 23, in <module>
    SECRET_KEY = os.environ['VARIABLE']
  File "/usr/lib/python3.7/os.py", line 678, in __getitem__
    raise KeyError(key) from None
KeyError: 'VARIABLE'