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Best practices when writing a Dockerfile for a Ruby application
The simplicity of the Dockerfile format is probably one of the reasons why Docker managed to become so popular in the first place. Getting something working is fairly easy. Producing a clean, small, secure image that will not leak secrets might not be as straight-forward though.
This presentation will try to share some best practices when writing a Dockerfile for a Ruby application. Most of these suggestions should be valid for any other runtime as well.