Simplify docker build: Don't depend on other images and unused layers.
Simplify docker build: Don't depend on other images and unused layers.

openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server