Issue parsing MITRE data

[neokjames]

The current installation process using Docker seems to have an issue parsing one or more of the MITRE / Atomic Red Team datasets, causing PurpleOps to fail to launch.

Waiting for Mongo...
==============================================================



         NEW INSTANCE DETECTED, LETS GET THE DATA WE NEED



==============================================================
Pulling MITRE tactics
Pulling MITRE techniques
Pulling SIGMA detections
Pulling Atomic Red Team testcases
Traceback (most recent call last):
  File "/usr/src/app/seeder.py", line 234, in <module>
    parseAtomicRedTeam()
  File "/usr/src/app/seeder.py", line 138, in parseAtomicRedTeam
    tactic = Technique.objects(mitreid=yml["attack_technique"]).first()["tactics"][0],
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
TypeError: 'NoneType' object is not subscriptable
[2026-01-15 03:03:04 +0000] [1] [INFO] Starting gunicorn 20.1.0
[2026-01-15 03:03:04 +0000] [1] [INFO] Listening at: http://0.0.0.0:5000 (1)
[2026-01-15 03:03:04 +0000] [1] [INFO] Using worker: sync
[2026-01-15 03:03:04 +0000] [45] [INFO] Booting worker with pid: 45
[2026-01-15 03:03:05 +0000] [45] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/gunicorn/arbiter.py", line 589, in spawn_worker
    worker.init_process()
  File "/usr/local/lib/python3.11/site-packages/gunicorn/workers/base.py", line 134, in init_process
    self.load_wsgi()
  File "/usr/local/lib/python3.11/site-packages/gunicorn/workers/base.py", line 146, in load_wsgi
    self.wsgi = self.app.wsgi()
                ^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
                    ^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/gunicorn/app/wsgiapp.py", line 58, in load
    return self.load_wsgiapp()
           ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/gunicorn/app/wsgiapp.py", line 48, in load_wsgiapp
    return util.import_app(self.app_uri)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/gunicorn/util.py", line 359, in import_app
    mod = importlib.import_module(module)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/usr/src/app/purpleops.py", line 24, in <module>
    security = Security(app, user_datastore)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/flask_security/core.py", line 1230, in __init__
    self.init_app(app, datastore, register_blueprint=register_blueprint)
  File "/usr/local/lib/python3.11/site-packages/flask_security/core.py", line 1383, in init_app
    self.remember_token_serializer = _get_serializer(app, "remember")
                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/flask_security/core.py", line 718, in _get_serializer
    return URLSafeTimedSerializer(secret_key=secret_key, salt=salt)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/itsdangerous/serializer.py", line 104, in __init__
    self.secret_keys: _t.List[bytes] = _make_keys_list(secret_key)
                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/itsdangerous/signer.py", line 64, in _make_keys_list
    return [want_bytes(s) for s in secret_key]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: 'NoneType' object is not iterable
[2026-01-15 03:03:05 +0000] [45] [INFO] Worker exiting (pid: 45)
[2026-01-15 03:03:06 +0000] [1] [INFO] Shutting down: Master
[2026-01-15 03:03:06 +0000] [1] [INFO] Reason: Worker failed to boot.

[neokjames]

I've submitted a pull request with a simple fix for the Atomic Red Team parsing issue.

The subsequent errors only seem to occur because of the ART parsing failure.

#56