Harden server and add Nix-native CI + self-hosted Gitea Actions
- caddy: security headers (X-Content-Type-Options/X-XSS-Protection/
X-Frame-Options) on all vhosts + baseline CSP; strip SnappyMail
upstream copies via header_down on mail.severijnse.eu
- tlsa-updater: compute TLSA 3 1 1 from cert SPKI (SHA-256), sync
_25/_465/_993, fail-safe placeholders; coredns zone updated
- pre-commit: wire cachix/git-hooks.nix (alejandra, statix, actionlint,
...); CI pre-commit job over x86_64 + aarch64 matrix
- gitea: enable Gitea Actions + self-hosted runner (native:host,
aarch64 via binfmt); add .gitea/workflows/ci.yml and local hook
- fix statix warnings (merge repeated systemd/database/configFile keys,
inherit, bool-compare guards); add missing trailing newlines
jory
e0453b0123
