Merge branch 'back' into 'main'

.gitignore

backend/.env.template

backend/Dockerfile

backend/app.py

backend/assets/keras_metadata.pb

backend/assets/saved_model.pb

backend/assets/variables/variables.data-00000-of-00001

backend/assets/variables/variables.index

backend/db/__init__.py

backend/db/crud.py

backend/db/database.py

backend/db/models.py

backend/db/schemas.py

backend/docker-compose.yml

backend/main.py

backend/requirements.txt

backend/utils/__init__.py

backend/utils/preprocessing.py