feat: add Docker support for cross-platform easy setup

Implements comprehensive Docker support to eliminate Python version and dependency concerns.
Users can now run the MCP server in a container with automatic path translation between
host and container filesystems.

Key features:
- Dockerfile with multi-architecture support (amd64/arm64)
- Automatic path translation using WORKSPACE_ROOT environment variable
- Setup scripts for all platforms (Bash, CMD, PowerShell)
- GitHub Actions workflow for automated Docker Hub publishing
- Secure non-root container execution
- Read-only volume mounts by default

The setup process is now simplified to:
1. Run setup-docker-env script to generate .env and Claude config
2. Build the Docker image
3. Copy generated config to Claude Desktop

No Python installation or virtual environment management required.

Fixes #3

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

.dockerignore

@@ -0,0 +1,72 @@
+# Git
+.git
+.gitignore
+
+# Python
+__pycache__
+*.pyc
+*.pyo
+*.pyd
+.Python
+*.egg
+*.egg-info/
+dist/
+build/
+*.so
+.coverage
+.pytest_cache/
+htmlcov/
+.tox/
+.mypy_cache/
+.ruff_cache/
+
+# Virtual environments
+venv/
+env/
+ENV/
+.venv/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Docker
+.dockerignore
+Dockerfile
+docker-compose*.yml
+
+# Environment files (contain secrets)
+.env
+.env.*
+*.env
+
+# Documentation
+*.md
+docs/
+examples/
+
+# Tests
+tests/
+test_*.py
+*_test.py
+
+# CI/CD
+.github/
+.gitlab-ci.yml
+.travis.yml
+
+# Logs
+*.log
+logs/
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+
+# OS specific
+Thumbs.db