What are Docker Build Args & How to Use Them [Tutorial]

Docker build arguments (build args) are variables that can be used in a Dockerfile to make the image building process configurable at build time. They don't affect the content of the image but allow for template-like configurations during the build process. Build args are defined in the Dockerfile and can be set or overridden using the --build-arg flag during the docker build command. These arguments are essentially environment variables that exist only during the image building phase, not saved in the Docker image, and cannot be accessed by running containers. They should not be used with secret values such as API tokens and credentials.