The nginx-unprivileged image runs as nginx user (uid 101), causing permission issues when trying to install packages or write to /home. Key fixes: - Add USER root before package installation RUN commands - Change HOME from /home/speedtest to /tmp (writable by any user) - Set USER nginx only at the end for runtime - Update docker-compose.yml HOME environment variable Build and runtime verified: - docker build completes successfully - Container starts without permission errors - nginx serves HTML on port 8080 - curl returns valid HTML response