update gitignore,dockerisation,sécurité edtfetcher

.gitignore

backend/EDTFetcher.py

backend/VCalFormatter.py

backend/main.py

backend/requirements.txt

docker-compose.yml

dockerfile

frontend/.env

frontend/.gitignore

frontend/src/components/Guide/Guide.tsx

frontend/src/components/LinkMaker/LinkMaker.tsx

start.sh