Tagged release v3.18.3
e184f32 chore: update project documentation, add guidelines, and apply Apache 2.0 license
- Added detailed `CONTRIBUTING.md` for contribution workflow.
- Created `CODE_OF_CONDUCT.md` to define expected behavior standards.
- Introduced `SECURITY.md` for vulnerability reporting and handling.
- Updated Helm chart dependency to version `0.16.0`.
- Applied Apache License 2.0.
issue: prozorro-sale/procedure#2579