So far, we have looked at the integrated build system, the Dockerfile syntax, and a sample life cycle, wherein we discussed how a sample Dockerfile is leveraged for generating an image and how a container gets spun off from that image. In this section, we will introduce the Dockerfile instructions, their syntax, and a few befitting examples.
The Dockerfile build instructions
The FROM instruction
The FROM instruction is the most important one and is the first valid instruction of a Dockerfile. It sets the base image for the build process. Subsequent instructions will use this base image and build on top of it. The Docker build system lets you flexibly use the images built by anyone. You can also extend them by adding more precise and practical features. By default...
