Prepare application for production deployment with Docker and PostgreSQL

Integrate PostgreSQL database support, add Docker deployment configurations, and implement health check endpoints.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ceced2fc-aa46-458d-ba87-ddd4b7bb1518
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/659922a9-0087-461c-90dd-6d9a58b81d4d/ceced2fc-aa46-458d-ba87-ddd4b7bb1518/ahHWEFX

.dockerignore

@@ -0,0 +1,41 @@
+# Dependencies
+node_modules
+npm-debug.log
+yarn-error.log
+
+# Development files
+.git
+.gitignore
+.env
+.env.local
+.env.*.local
+
+# Build artifacts
+dist
+.vite
+*.log
+
+# IDE files
+.vscode
+.idea
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Documentation
+README.md
+docs
+
+# Test files
+**/*.test.ts
+**/*.spec.ts
+coverage
+
+# Temporary files
+tmp
+temp
+*.tmp