Added Salvi's backend folder from backend branch to allow ombase to continue testing.

Backend/.gitignore

@@ -0,0 +1,57 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Environment files
+.env
+.env.*.local
+
+# Build outputs
+dist/
+build/
+
+# Static files
+public/
+out/
+
+# Test files
+coverage/
+*.lcov
+
+# Database files
+*.sqlite3
+*.db
+*.db-wal
+*.db-shm
+
+# Temporary files
+*.tmp
+*.temp
+*.swp
+*.swo
+
+# IDE and editor files
+.vscode/
+.idea/
+*.iml
+
+# System files
+.DS_Store
+Thumbs.db
+
+# Other
+*.log.*