Add dev containers and GitHub Actions CI/CD setup

[jwaldrip]

Dev Container Setup

• Add comprehensive VS Code dev container configuration
• Create Dockerfile with Crystal 1.8.1, PostgreSQL client, Redis CLI
• Configure docker-compose with PostgreSQL 15 and Redis 7 services
• Add post-create script for automated setup and migrations
• Create detailed dev container README with troubleshooting guide
• Add VS Code tasks for common operations (build, test, format, etc.)
• Add VS Code launch configurations for debugging
• Configure non-root user (vscode) with sudo access and zsh shell

GitHub Actions Setup

• Add CI workflow for automated testing and building
  • Run tests with PostgreSQL and Redis services
  • Check code formatting with Crystal formatter
  • Run Ameba linter (if available)
  • Build Docker images for web and job_runner
  • Cache dependencies for faster builds
• Add Railway deployment workflow for CD
  • Auto-deploy on push to main branch
  • Support manual workflow dispatch
• Add Dependabot configuration
  • Weekly updates for GitHub Actions
  • Weekly updates for Docker images
  • Weekly updates for dev container images

Project Templates

• Add pull request template with comprehensive checklist
• Add bug report issue template
• Add feature request issue template
• Create GitHub Actions setup documentation

Documentation Updates

• Update main README with:
  • CI/CD status badges
  • Dev container quick start guide
  • Railway deployment section
  • GitHub Actions overview
• Add .env.example for environment variable reference
• Update .gitignore to exclude .env files

Developer Experience Improvements

• One-command dev environment setup via dev containers
• Automated database migrations on container creation
• Pre-configured VS Code extensions and settings
• Integrated debugging support
• Automated CI/CD pipeline
• Dependency update automation

This setup enables contributors to get started in minutes and ensures code quality through automated testing and linting on every PR.

🤖 Generated with Claude Code