DEV1.0: Initial commit - Workflow Portal with security fixes

- Backend: Express.js + PostgreSQL/SQLite with LDAP/AD integration
- Frontend: React 18 + Vite + TailwindCSS/DaisyUI
- Security fixes applied (2026-07 + 2026-08):
  - LDAP injection prevention, CSRF protection, HttpOnly cookies
  - Session hashing (SHA-256), account lockout, rate limiting
  - Input validation (zod), file upload security, CSP/HSTS headers
  - V3: express-rate-limit updated (ip-address SSRF fix)
  - V4: postcss updated (nanoid DoS fix)
  - V5: Rate-limit on /health endpoint
  - V6: Session rotation on login (session fixation prevention)
  - V9: Task values array limit (DoS prevention)
  - V10: Frontend XSS audit completed
- Docker: Multi-stage build, non-root user, PostgreSQL + backup service

.dockerignore

@@ -0,0 +1,33 @@
+# ============ Dependencies ============
+**/node_modules
+**/package-lock.json
+
+# ============ Build Artifacts ============
+**/dist
+frontend/dist
+
+# ============ Data & Secrets ============
+**/data
+**/.env
+**/.env.*
+!.env.example
+
+# ============ Git ============
+.git
+.gitignore
+
+# ============ IDE ============
+.vscode
+.idea
+*.swp
+*.swo
+
+# ============ Docker ============
+Dockerfile
+docker-compose.yml
+.dockerignore
+
+# ============ Misc ============
+**/*.md
+**/.DS_Store
+**/Thumbs.db