Add comprehensive .gitignore

.gitignore

@@ -0,0 +1,85 @@
+# Dependencies
+node_modules/
+maternal-app/node_modules/
+maternal-app-backend/node_modules/
+maternal-web/node_modules/
+
+# Environment variables
+.env
+.env.local
+.env.development
+.env.production
+maternal-app/.env
+maternal-app-backend/.env
+maternal-web/.env
+
+# Build outputs
+dist/
+build/
+maternal-app/dist/
+maternal-app-backend/dist/
+maternal-web/.next/
+maternal-web/out/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+*.pid
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Expo
+maternal-app/.expo/
+maternal-app/.expo-shared/
+
+# Database
+*.sqlite
+*.sqlite3
+
+# Docker volumes
+postgres_data/
+redis_data/
+mongodb_data/
+minio_data/
+
+# Testing
+coverage/
+.nyc_output/
+
+# TypeScript
+*.tsbuildinfo
+
+# React Native
+maternal-app/android/
+maternal-app/ios/
+!maternal-app/android/.gitkeep
+!maternal-app/ios/.gitkeep
+
+# Caches
+.cache/
+.turbo/
+.parcel-cache/
+.npm/
+.eslintcache
+
+# Next.js specific
+maternal-web/.next/
+maternal-web/out/
+maternal-web/.cache/
+
+# Package manager lock files (optional - uncomment if you want to ignore)
+# package-lock.json
+# yarn.lock
+# pnpm-lock.yaml