feat: optimize CI, devcontainer, and testing for remote codespace

[IBERMOLINA]

This PR adds comprehensive optimizations for remote development:

• CI Workflow: Extended Docker smoke test to build Next.js app and Docker image with shellcheck-compliant commands.
• Dev Container: Added Node 20 and Docker-in-Docker features, postCreateCommand for auto-setup.
• Testing: Set up Jest with React Testing Library for the web app.
• Shell Integrations: Fixed YAML and devcontainer for better shellcheck compliance.

All changes are backward-compatible and improve the development experience in GitHub Codespaces.

[Copilot]

Pull Request Overview

The PR implements comprehensive optimizations for remote development, particularly targeting GitHub Codespaces. It establishes a complete Next.js web application with authentication, testing infrastructure, and Docker containerization.

• Added full Next.js 15 web application with Clerk authentication
• Set up Jest testing framework with React Testing Library
• Created optimized Docker build with multi-stage setup

Reviewed Changes

Copilot reviewed 127 out of 159 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
web/package.json	Defines Next.js 15 app dependencies including Clerk, Sentry, PostHog, and Stripe integrations
web/tailwind.config.ts	Configures Tailwind with custom dark/light theme colors
web/next.config.ts	Sets up standalone output for Docker with webpack cache disabled
web/middleware.ts	Implements Clerk-based authentication middleware with route protection
web/jest.config.js	Configures Jest with Next.js integration and Clerk mocking
web/Dockerfile	Multi-stage Docker build optimized for Next.js standalone output
web/app/*.tsx	Complete app structure with authentication pages and protected routes

[Copilot]

Disabling webpack cache globally can significantly slow down development builds. Consider using more targeted cache configuration or investigating specific serialization issues rather than disabling cache entirely.

Suggested change

	config.cache = false; // Disable cache to avoid serialization issues
	// Use filesystem cache for better performance, and customize if needed to avoid serialization issues
	config.cache = {
	type: 'filesystem',
	// You can customize buildDependencies or version here if you have specific serialization issues
	// buildDependencies: {
	// config: [__filename],
	// },
	};