Docker and CI/CD · Middle · Question 2 of 75

Why does this Dockerfile reinstall all dependencies on every code change? ```dockerfile COPY . . RUN npm ci`

✓Correct answer: Any file change invalidates COPY . ., so npm ci reruns too
2npm ci always ignores the Docker build cache by design
3COPY . . must come after RUN, or the build fails

Explanation

Cache invalidation cascades: once a layer changes, every later layer is rebuilt. Copy package.json and the lockfile, run npm ci, then copy the rest.

Why does this Dockerfile reinstall all dependencies on every code change? ```dockerfile COPY . . RUN npm ci`

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Why does this Dockerfile reinstall all dependencies on every code change? ``dockerfile COPY . . RUN npm ci

Explanation

Further reading

Test yourself

Why does this Dockerfile reinstall all dependencies on every code change? ```dockerfile COPY . . RUN npm ci`