Created example env, updated docker-compose, added valkey to supervisord

THIRD_PARTY_NOTICES.md

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+# Third-party notices
+
+This project is licensed under the GNU AGPL v3. It includes third-party components that
+are distributed under their own licenses. When redistributing Keywarden (source or binary),
+ensure you comply with each component's license terms and include required notices.
+
+## Valkey
+Valkey is included in the container image and used as the cache backend.
+License: BSD 3-Clause. See `LICENSES/valkey.BSD-3-Clause.txt`.
+
+## Other third-party components
+This repository and container image include additional dependencies (Python packages and
+system packages). Their licenses typically require you to retain copyright notices and
+license texts when redistributing binaries. Review the following sources to determine
+exact obligations:
+
+- `requirements.txt` for Python dependencies.
+- `Dockerfile` for system packages installed into the image.
+- `app/static/` and `app/theme/` for bundled frontend assets.
+
+If you need a full license inventory, generate it from your build environment and add
+corresponding license texts under `LICENSES/`.