Configure for self-hosted deployment

- Add environment variable support for Supabase and Pakasir configurations
- Create Docker configuration with Nginx for production deployment
- Add .env.example with all required environment variables
- Remove hardcoded URLs from Supabase client and Checkout component
- Add Docker and Nginx configuration files for Coolify deployment

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,79 @@
+# Dependencies
+node_modules
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# Build outputs
+dist
+dist-ssr
+build
+
+# Development
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Cache
+.cache
+.parcel-cache
+.temp
+.tmp
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# OS
+Thumbs.db
+
+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# Git
+.git
+.gitignore
+README.md
+
+# Documentation
+docs
+
+# Tools
+.eslintrc.cjs
+.gitlab-ci.yml
+.github
+
+# Testing
+__tests__
+tests
+*.test.js
+*.test.ts
+*.test.tsx
+*.spec.js
+*.spec.ts
+*.spec.tsx
+
+# Misc
+*.md
+!README.md