A Dockerfile is a configuration file you write for your application requirements, which in turn produces a Docker image that can be used to run containers.
Let's have a look at some of the common requirements for packaging an application into a container image:
- Choose a base image: Your application will run on some standard OS, such as Ubuntu, CentOS, windowsservercore, and so on. Sometimes, it doesn't have to be an OS and could be a platform image that will contain everything that's needed for the platform to function. nginx is one example of this. An nginx image would include everything that's needed to run the nginx web server in a container, and all you would need to do is add your web app files. In the first ...