Merges fixed code from the issue-1 branch back into master: fixes issues with Hardcoded IP across deployments, the App.js src using .env file and multivendor support
- Changed CVEs table constraint from UNIQUE(cve_id) to UNIQUE(cve_id, vendor)
- Added vendor column to documents table for proper file organization
- Updated backend INSERT statements to include vendor field in both CVE and document creation
- Fixed document retrieval to filter by vendor
- Created corrected setup.js that includes multi-vendor support from initial setup
- Added migration scripts for existing databases
Resolves#1: Users can now add the same CVE-ID with multiple different vendors, each maintaining separate document storage organized as CVE-ID/Vendor/files
