Implement complete Docker Compose CI/CD setup with optimized builds

- Add multi-stage Dockerfile with dependency caching for both frontend and backend
- Implement Docker Compose configuration with separate frontend/backend services
- Configure Caddy as reverse proxy with proper WASM and static file serving
- Add volume mounting for frontend assets shared between containers
- Optimize build process with staged compilation and workspace handling
- Add debug logging and WASM initialization tracking for production deployment
- Update README with project motivation and "vibe coded" disclaimer

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

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

.dockerignore

@@ -1,6 +1,9 @@
 # Build artifacts
 target/
-dist/
+frontend/dist/
+backend/target/
+# Allow backend binary for multi-stage builds
+!backend/target/release/backend
 
 # Git
 .git/
@@ -21,8 +24,18 @@ Thumbs.db
 
 # Documentation
 README.md
-*.md
 
-# Docker
-Dockerfile
-.dockerignore
+# Development files
+CLAUDE.md
+*.txt
+test_*.js
+
+# Database files
+*.db
+calendar.db
+
+# Test files
+**/tests/
+
+# Migrations (not needed for builds)
+migrations/