mendelu/Docker build fails with permission denied when creating /install

[Paurikova2]

Problem

During the Docker build process, the following error occurs:

mkdir: cannot create directory ‘/install’: Permission denied

This happens in the build stage when running:

RUN mkdir /install \
    && chown -Rv dspace: /install \
    && chown -Rv dspace: /app

Root Cause

The base image dspace/dspace-dependencies:dspace-9_x now runs as a non-root user (dspace) by default.
Because of this change, the container no longer has permission to create directories in the root filesystem (/), which causes the build to fail when attempting to create /install.

Fix

The issue was resolved by explicitly switching to the root user before creating the directory:

USER root
RUN mkdir /install \
    && chown -Rv dspace: /install \
    && chown -Rv dspace: /app
USER dspace

This allows the directory to be created with sufficient permissions, after which ownership is assigned back to the dspace user and the build continues securely as a non-root user.

Manual Testing (if applicable)

• Added to testing scenarios

Copilot review

• Requested review from Copilot

[Paurikova2]

@milanmajchrak I checked the Dockerfile of dspace_9_x, and there are more changes: https://github.com/DSpace/DSpace/commits/dspace-9_x/Dockerfile
Do we want to cherry-pick them all? I think they are usefull.

Answer: we don't want it, but good point