Update app.py, format_conversions.py, and hexachords.py

Update app.py

Update app.py, format_conversions.py, and hexachords.py

Update app.py

Update app.py

Updated app.py and format_conversions.py

Update app and hexachord

Update app.py

Update app and requiremnts

Updated app.py and format_conversions.py

Update Dockerfile and app.py

Update .gitignore with comprehensive patterns for generated and system files

Update Dockerfile and application files

Update app.py

Update app.py

Update Dockerfile and app.py

Update app.py

Updated Dockerfile, README.md, and app.py

Add Dockerfile, app.py, and example.mei