REFACTOR(repo): simplify project structure

- Move services/nextjs to nextjs/
- Move deploy/docker/Dockerfile.prod to Dockerfile
- Add GitHub Actions workflows (ci.yml, build.yml)
- Remove deploy/, services/, scripts/ folders

.dockerignore

@@ -0,0 +1,148 @@
+# Dependencies
+node_modules
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Next.js
+.next/
+out/
+build/
+
+# Production
+dist/
+
+# Environment variables
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Coverage directory used by tools like istanbul
+coverage/
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Dependency directories
+jspm_packages/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+
+# Nuxt.js build / generate output
+.nuxt
+
+# Gatsby files
+.cache/
+public
+
+# Storybook build outputs
+.out
+.storybook-out
+
+# Temporary folders
+tmp/
+temp/
+
+# Editor directories and files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Git
+.git
+.gitignore
+
+# Docker
+Dockerfile*
+docker-compose*
+.dockerignore
+
+# Documentation
+README.md
+*.md
+
+# Backup files
+backups/
+*.backup
+*.bak
+
+# Uploads (should be handled by volumes)
+uploads/
+
+# SSL certificates
+ssl/
+
+# Nginx config (handled by volumes)
+nginx/
+
+# Scripts
+scripts/
+backup-scripts/
+
+# Prisma
+prisma/migrations/
+
+# TypeScript
+*.tsbuildinfo
+
+# Testing
+coverage/
+.nyc_output/
+
+# Misc
+.editorconfig
+.prettierrc
+.eslintrc*
+
+# Trunk
+.trunk