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From Docker v 17.05, multi-stage build lets us build docker images in stages with multiple FROM statements. Multi-stage builds are more streamlined and we have optimized our images to be more environment-specific. We look into how you can exploit docker multi-structure build to build optimal images suited for dev/test and production with a NodeJs example application. We start with a base image that has node, then copy needed files to the image like 1-5-5MB for production.