Docker containerization

Docker packages applications into standardized units called containers to ensure code runs identically from a local MacBook to an AWS production cluster.

Docker isolates software into lightweight containers to eliminate environment friction. By leveraging core Linux primitives (namespaces and cgroups), it bundles application code with specific dependencies into a single immutable image. This approach replaces heavy Virtual Machines (VMs) with agile units that share the host OS kernel: reducing boot times to seconds and slashing resource overhead. Teams use Docker to standardize the stack across the lifecycle (from local development to Kubernetes orchestration) ensuring that a Python microservice or a Redis cache performs consistently regardless of the underlying infrastructure.

https://www.docker.com