ci: push the images to Docker Hub in the public organization hf (#595)
* ci: push the images to Docker Hub in the public organization hf
* ci: 🎡 use Docker Hub images for e2e and deployment
* ci: 🎡 don't push anymore to AWS private ECR
also: fix a typo
* ci: 🎡 update safety to remove a vulnerability
* ci: 🎡 store docker build cache to the Docker Hub
we expect it to improve a lot the build time in the CI. Currently: about
13m for worker, 2m for api, 2m for admin
* docs: ✏️ update the docs: the docker images are on Docker Hub