Security Audit Fixes: Session fixation prevention, SameSite cookies, audit log redaction, backup integrity, Docker hardening, error sanitization, rate limiting, trusted proxies, and config hardening

.gitignore

@@ -1,8 +1,28 @@
-bin/
-node_modules/
-dist/
-data/
-*.db
+# Environment variables
 .env
+
+# SQLite databases
+*.db
+*.sqlite
+
+# Binary artifacts
+backend/bin/
+frontend/dist/
+
+# Node modules
+node_modules/
+
+# IDE / editor artifacts
 .idea/
 .vscode/
+
+# Generated / runtime files
+data/
+*.log
+
+# Traefik GUI specific
+configs/dynamic/*.bak.*
+configs/dynamic/*.tmp.*
+
+# OS specific
+.DS_Store