e73d47a875
archive.ubuntu.com is unreachable from the build server, causing apt-get to time out and fail every build. curl was only used for the HEALTHCHECK. Replace with a zero-dependency bash TCP check: bash -c 'echo > /dev/tcp/localhost/8080' No packages needed, no external network access required. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>