Push and pull images from Docker Hub, GitHub Container Registry, and self-hosted registries.
Pushing Images to Registries
# Docker Hub
docker login
docker tag myapp:latest username/myapp:1.0
docker push username/myapp:1.0
# GitHub Container Registry
docker login ghcr.io -u USERNAME
docker tag myapp ghcr.io/org/myapp:latest
docker push ghcr.io/org/myapp:latest
# Self-hosted registry
docker run -d -p 5000:5000 --name registry registry:2
docker tag myapp localhost:5000/myapp
docker push localhost:5000/myapp