What Docker instruction will you use to copy files from one layer to another layer when you are creating a Dockerfile?
Experience Level: Senior
Tags: Docker
Answer
Option 1: Copy a file from previous stage to a new stage:
FROM image AS stage1
# ...
FROM image AS stage2
COPY --from=stage1 /files /new-target-folder
Option 2: Copy a file from an external image as a "stage":
COPY --from=nginx:latest /etc/nginx/nginx.conf /nginx.conf
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