Run applications in consistent, portable Docker containers.
Learn the building blocks behind images, containers, volumes, networks and a clean deployment workflow for servers.
Start learning →Understand the Docker building blocks
Docker packages application processes and dependencies into repeatable units while keeping persistent data and configuration explicit.
Images & containers
An image is a reusable template; a container is a running instance of that image.
Volumes & data
Keep important application data outside the disposable container layer.
Networks & ports
Connect services privately and publish only the ports that users need.
Containers are not automatic security.
Use trusted images, keep them updated, avoid unnecessary privileges and protect secrets outside the image and source repository.
Avoid unexpected changes by using intentional image versions.
Run with only the permissions and capabilities required.
Monitor whether services are actually ready and responsive.
Collect useful logs and back up persistent data.
A clean container workflow
Define
Create the image instructions and application configuration.
Build
Build and test the image in a controlled environment.
Run
Start containers with explicit ports, volumes and variables.
Maintain
Update images, monitor health and remove unused resources.
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