Docker is built primarily in the Go programming language (Golang). Go was chosen for its speed, simplicity, and ability to handle many tasks concurrently, making it ideal for creating and managing containers. Docker’s core engine and APIs are written in Go. Dockerfiles, which define how to build images, use a simple declarative syntax. While Docker itself is powered by Go, you can run any language, such as Python, Java, or Node.js, inside containers with Docker.
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