Add gitignore to exclude sample data and database files

.gitignore

@@ -0,0 +1,65 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  * https://pyinstaller.readthedocs.io/en/latest/usage.html#cmdoption-onefile
+*.onefile
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS generated files
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+
+# Environment
+.env
+.venv/
+venv/
+
+# Database
+*.db
+facts.db
+
+# Sample data
+sample/
+
+# Docker
+.dockerignore
+*.docker