chores: Add hot reloading in docker

[sharryy]

No description provided.

[Copilot]

Pull Request Overview

This PR configures hot-reload and file watching for the Next.js frontend development environment in Docker. The changes enable proper file change detection when running the frontend in a Docker container by adding volume mounts, polling configuration, and appropriate ignore rules.

Key Changes:

• Added webpack watch options with polling configuration to next.config.ts for file change detection
• Configured Docker volumes and environment variables for hot-reload support in docker-compose.yml
• Created comprehensive .dockerignore file and updated .gitignore with IDE-specific entries

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

File	Description
frontend/apply/next.config.ts	Adds webpack watchOptions with polling for file change detection in Docker
docker-compose.yml	Configures volume mounts and polling environment variables for frontend hot-reload
.gitignore	Adds IDE-specific directories (.claude, .idea, .junie, .cursor)
.dockerignore	Creates comprehensive exclusion list for Docker builds including dependencies, build artifacts, and IDE files

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.