feat: upgrade base image to Ubuntu 26.04 LTS - #48
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Ships newer, less-CVE-laden package versions and extends standard security support to 2031 (24.04 ends April 2029). Verified before the bump: the ubuntu uid-1000 user still exists (userdel path unchanged), Python is 3.14 (PEP 668 --break-system-packages still applies), and openssh-server/vim-tiny are available. Closes #34.
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Closes #34
What
FROM ubuntu:24.04→FROM ubuntu:26.04plus the matching comment/README updates.Pre-verified (per the issue's checklist)
userdel ubuntu— 26.04 still ships theubuntuuser at uid 1000, so the existing removal step is unchanged and required.--break-system-packagesstays.ansibleavailability — no longer relevant: since feat: slim image with pip ansible-core and native arm64 builds #44 the image installsansible-corefrom pip, which sidesteps the distro packaging question entirely.openssh-server(10.2),vim-tiny,python3-pipall present in 26.04.CVE expectation
24.04's base layers carried the bulk of the remaining MEDIUM/LOW findings; the scheduled Trivy scan after this publishes should show the drop. CI on this PR builds both platforms and smoke-tests sshd + ansible on the new base.
Summary by cubic
Upgraded the Docker base image to Ubuntu 26.04 LTS to reduce CVEs and extend support through 2031. Updated README and comments; build and runtime behavior remain the same.
ubuntu:24.04→ubuntu:26.04userdel ubuntuand pip--break-system-packages(Python 3.14 / PEP 668)openssh-server,vim-tiny, andpython3-pipremain availableWritten for commit 5905733. Summary will update on new commits.