Testing, documentation & deployment preparation

[mindedal]

This pull request introduces Docker support and production deployment configuration for the GoChat server, along with improved documentation and environment management. It includes a multi-stage Dockerfile, a docker-compose.yml for local orchestration, environment variable templates, and updates to ensure configuration is loaded from the environment. Additionally, comprehensive API documentation is added, and some build/development docs are removed to streamline the documentation set.

Dockerization and Deployment:

• Added a multi-stage Dockerfile for building and running the GoChat server as a minimal, secure production container image.
• Introduced docker-compose.yml for local development and deployment, including environment configuration, health checks, and network setup.
• Created a .dockerignore file to exclude unnecessary files from Docker build context, improving build performance and security.

Configuration and Environment Management:

• Added .env.example as a template for environment variables, documenting all configurable server options for easy setup.
• Updated server startup in cmd/server/main.go to load configuration from environment variables using NewConfigFromEnv().

Documentation Updates:

• Added docs/API.md, a comprehensive WebSocket API reference with usage examples and error handling details for multiple languages.
• Removed docs/BUILD_GUIDE.md and docs/CROSS_PLATFORM.md to declutter documentation, as Docker-based workflows supersede manual build instructions. [1] [2]

[Copilot]

Pull Request Overview

This PR introduces comprehensive production deployment capabilities for GoChat, transforming it from a development-focused project into a production-ready WebSocket chat server. The changes include Docker containerization, environment-based configuration, extensive API documentation, and security documentation while streamlining the documentation structure.

Key changes:

• Added Docker support with multi-stage builds and production-ready container configuration
• Implemented environment variable configuration system for flexible deployment
• Created comprehensive API documentation with multi-language examples
• Added extensive security and deployment documentation

Reviewed Changes

Copilot reviewed 24 out of 25 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/unit/hub_test.go	Added comprehensive hub tests including registration, unregistration, broadcasting, and shutdown scenarios
test/integration/websocket_test.go	Enhanced message verification to handle batched messages separated by newlines
test/integration/security_test.go	New comprehensive security tests covering origin validation, message size limits, and combined constraints
test/integration/multiclient_test.go	New extensive multi-client integration tests with concurrent operations and edge cases
internal/server/config.go	Added environment variable configuration system with parsing functions
docs/SECURITY.md	New comprehensive security documentation covering origin validation, rate limiting, and best practices
docs/GETTING_STARTED.md	New user-friendly getting started guide replacing complex cross-platform documentation
docs/DEVELOPMENT.md	New comprehensive development guide with tooling, testing, and contribution workflows
docs/DEPLOYMENT.md	New extensive production deployment guide with reverse proxy, TLS, and Docker configurations
docs/CONTRIBUTING.md	New detailed contribution guidelines and development workflow
docs/BUILDING.md	New comprehensive build guide replacing scattered build documentation
docs/API.md	New detailed WebSocket API documentation with multi-language examples
docker-compose.yml	Production-ready Docker Compose configuration with health checks and environment management
cmd/server/main.go	Updated to use environment-based configuration
README.md	Completely restructured to focus on production readiness and ease of use
Dockerfile	Multi-stage production Dockerfile with security best practices
.env.example	Configuration template with detailed explanations
.dockerignore	Optimized Docker build context exclusions

Comments suppressed due to low confidence (1)

test/integration/security_test.go:1

• This appears to be stray YAML content mixed into the Go test file, likely from a copy-paste error. This invalid Go code will prevent compilation.

// Package integration contains security-focused integration tests.

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