1.6GB Docker Image, 8-Minute Builds. Add Runners?
Your image is huge and every code change rebuilds from scratch. A teammate wants to just add more CI runners. Defend how you actually fix it.
Docker
CI/CDthe decision you defend
Your Node app's Docker image is 1.6GB and every code change rebuilds dependencies from scratch, so CI takes 8 minutes. A teammate says just add more CI runners. How do you fix the image, and why?
the situation
Your team's Node service ships as a Docker image. The image is 1.6GB, and CI takes about 8 minutes per run because every commit reinstalls all dependencies before building.
context
The Dockerfile starts from a full node base image, copies the whole project in one COPY, then runs npm install and the build. There is no .dockerignore. A teammate suggests just adding more CI runners so builds finish faster.
How this challenge works
Take a position on the decision above and defend it. A senior-engineer AI will push back over up to 4 rounds. When you are done, you are scored against a verified rubric so you can see exactly what a complete answer covers - these are learning prompts, not gotchas.