Use a ‘slim’ runtime picture
For a lot of purposes written in languages that require a runtime, you need to use a “slim” runtime picture for the language. These are prebuilt photos that comprise the naked minimal of what’s wanted to launch and run an utility written within the given language.
It’s price saying once more that slim photos solely provide you with what’s wanted to assist the runtime itself, not your explicit utility. As an illustration, when you have a Python utility that wants third-party packages from PyPI, you have to add these as a part of the picture construct course of (RUN pip set up, and so on.).
One other good supply for slender base photos, constructed for particular use instances, is the Google Distroless Picture assortment. They’re constructed on high of stripped-down cases of Debian Linux, run on a number of architectures, and supply included runtimes for Python 3, C-compiled applications, Java (together with variations 17 and 21), and Node.js (variations 18, 20, and 22). They don’t comprise shells or package deal managers, so you have to configure your Dockerfile’s ENTRYPOINT so it received’t try to make use of a shell (e.g., ENTRYPOINT ["start"] as an alternative of ENTRYPOINT "begin") or provide arguments to the language runtime configured because the default.
