Docker Build Context
The Docker CLI serves as our local interface, while the Docker daemon acts as a remote server running Docker. When building an image, Docker transfers files from the build context to a temporary directory within the Docker filesystem, typically located at /var/lib/docker/tmp. Including only necessary files in the build context is crucial to optimise the build process.
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To prevent unnecessary files from being included in the build context, you can utilize a .gitignore file. By specifying files to ignore in this file, they won’t be considered part of the build process. This approach helps maintain a clean and efficient build environment.
In the event of a build failure at any stage, Docker leverages its caching mechanism. This means it repurposes previously built layers from the cache instead of rebuilding them entirely. This caching strategy significantly speeds up subsequent builds by avoiding redundant work.
