feat(docker): add containerization for production deployment

- Added Dockerfile with multi-stage build (Go 1.25rc1-alpine)
- Added docker-compose.yml for easy deployment
- Added .dockerignore for efficient builds
- Bot now runs in Podman/Docker container as intended

🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,50 @@
+# Binaries
+bin/
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Test files
+*.test
+coverage.out
+coverage.html
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Git
+.git/
+.gitignore
+
+# Docker
+Dockerfile
+docker-compose.yml
+.dockerignore
+
+# Logs
+logs/
+*.log
+
+# Cache
+.gocache/
+.gomodcache/
+
+# Docs
+docs/
+CLAUDE.md
+README*.md
+PRODUCTION_READY.md
+*.md
+
+# Original V1
+orig/
+
+# Scripts (not needed in container)
+scripts/
+
+# Contracts (not needed in runtime)
+contracts/