The docker build command builds Docker images from a Dockerfile and a “context”. A build’s context is the set of files located in the specified PATH or URL . The build process can refer to any of the files in the context. For example, your build can use a COPY instruction to reference a file in the context.

What happens during a Docker build?

The docker build command builds Docker images from a Dockerfile and a “context”. A build’s context is the set of files located in the specified PATH or URL . The build process can refer to any of the files in the context. For example, your build can use a COPY instruction to reference a file in the context.

What is difference between build and run in Docker?

docker build builds a new image from the source code. docker create creates a writeable container from the image and prepares it for running. docker run creates the container (same as docker create ) and runs it.