Every language's Dockerfile fallback template now pulls from
harbor.192.168.1.7.nip.io/base-images/... (mirrored from Docker Hub via
the new devops-base-images repo) instead of pulling live from Docker
Hub on every build. Eliminates that external dependency at build time,
and lets the mirrored tags be deliberately the leanest official
variant rather than whatever a public tag happens to default to.
- go: unchanged tags (golang:1.22-alpine, alpine:3.20 — already
minimal), just re-hosted.
- node/python/java: moved from their Debian-slim defaults to the
-alpine equivalent (node:20-alpine, python:3.12-alpine,
maven:3-eclipse-temurin-21-alpine, eclipse-temurin:21-jre-alpine).
- php: bigger change — dropped php:*-apache (Debian, full Apache
httpd) entirely for php:*-cli-alpine + PHP's own built-in dev server
(`php -S`), moving to port 8080 like every other language instead of
PHP's special-cased 80. Not production-grade PHP serving (PHP's own
docs call the built-in server not designed for that), but genuinely
minimal and fine for a homelab/demo app — would need php-fpm+nginx
for anything serving real traffic.
Only versions actually mirrored into Harbor resolve now — a
dockerBuildVersion whose tag isn't in devops-base-images/images.txt
needs that added and re-mirrored first, unlike pulling straight from
Docker Hub where any tag "just worked". Chose keeping a shell (Alpine)
over full distroless — homelab kubectl-exec debuggability weighed more
than the last bit of attack-surface reduction.
Mukul Sharma
4b908150e4