chore: repo cleanup - pin actions, fix typos, improve gitignore
- build.yml: pin push-to-registry to SHA
- build-installer-iso.yml: pin checkout/upload-artifact to SHA,
replace hardcoded registry with env vars, add env block
- Justfile: fix 'Virtal' typo (10x), fix shfmt error msg,
quote $file in check/fix recipes
- .gitignore: add *.iso, *.qcow2, *.raw, .env, *.log
- iso/config.toml: remove leading space
- Containerfile: remove non-existent /tmp/build from cleanup
- build/50-prepare-flatpak-for-bazaar.sh: add executable permission
- build/README.md: update to reflect current script names
gunnar
a957c96fa1