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In this article I’m going to demonstrate a few tips and tricks which can make your life easier when you are building or maintaining Dockerfiles. The need for a Build Pipeline Do we really need any kind of continuous integration or build pipeline for Dockerfiles? There will be cases when the answer is no. However, if the answer to any of the following questions is ‘yes’, it might be worth considering:

Yikes, this took far too long to figure out! I have a service which takes plain text multi-line input and outputs an object for each line, something like this: Input Line 1 Line 2 Line 3 Output [ {line: "Line 1"}, {line: "Line 2"}, {line: "Line 3"} ] There’s a bit more to it than that, but that’s the gist. I want to test my service with cURL, trying: curl --data "Line 1\nLine 2\nLine 3" \ -H "Content-Type: text/plain" localhost:3000/parse This did not work.