feat: Add healthcheck and dynamic port support in Dockerfile

Dockerfile

@@ -11,11 +11,11 @@ COPY src/ ./src/
 COPY index.ts ./
 
 # Health check
-# HEALTHCHECK --interval=30s --timeout=3s \
+HEALTHCHECK --interval=30s --timeout=3s \
-# 	CMD curl -f http://localhost:3007/health || exit 1
+	CMD curl -f http://localhost:${PORT:-3007}/health || exit 1
 
-# Server runs on port 3007 by default
+# Server runs on port from environment variable
-EXPOSE 3007
+EXPOSE ${PORT:-3007}
 
 # Start the server
 CMD ["bun", "run", "index.ts"]