What are Docker context and how do you manage multiple Docker environments?

Docker context allows managing multiple Docker environments from single client: 1) Default context: Points to local Docker daemon, 2) Remote contexts: Connect to remote Docker hosts, Docker Swarm clusters, Kubernetes clusters, 3) Context management: docker context create myremote --docker host=tcp://remote:2376, docker context use myremote, docker context ls (list contexts), docker context inspect myremote, 4) Use cases: Development vs production environments, Multiple cloud providers, Hybrid deployments, Team collaboration, 5) Security: TLS certificates for secure connections, SSH tunneling for remote access, 6) Examples: docker context create prod --docker host=tcp://prod.example.com:2376 --docker ca=ca.pem --docker cert=cert.pem --docker key=key.pem, docker context use prod, docker ps (now shows prod containers). Benefits: Single CLI for multiple environments, Secure remote management, Easy environment switching, Simplified deployment workflows. Best practices: Use descriptive context names, Secure remote connections, Document context configurations, Regular context cleanup.