![]() ![]() Add the following to the beginning of your Dockerfile to use the official CentOS 7 image from the Docker Hub.The FROM instruction needs to be the first instruction in your Dockerfile, as it is the environment all subsequent instructions will be ran in. ![]() In our example, we will be using the official CentOS image from our previous tutorials. The FROM instruction specifies the base image to use as a foundation to our new image. In this tutorial we will be using the following instructions: FROM You can read more about instructions and arguments in the dockerfile reference documentation Each line has an instruction and argument. The dockerfile format is fairly straightforward. Create a new directory for your docker build file.This will help keep everything organized and give you a place to store any extra files if needed. It is recommended that each docker file is contained in a separate directory. We will go over how to create one for nginx on CentOS in this tutorial. A docker file is essentially a script which can recreate the building of your image. The recommended way to create images for sharing is from a docker file. ![]()
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