nixos/nextcloud: set X-Robots-Tag to "noindex, nofollow"

[dotlambda]

Description of changes

Upstream did so in nextcloud/server#36689 and Nextcloud now complains that

The "X-Robots-Tag" HTTP header is not set to "noindex, nofollow".
This is a potential security or privacy risk, as it is recommended
to adjust this setting accordingly.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[dotlambda]

@etu @Ma27 Should grocy do the same?

[RaitoBezarius]

Thank you!

[Ma27]

@etu @Ma27 Should grocy do the same?

Sounds reasonable.

[github-actions]

Successfully created backport PR for release-22.11:

• [Backport release-22.11] nixos/nextcloud: set X-Robots-Tag to "noindex, nofollow" #223247

[github-actions]

Git push to origin failed for release-22.11 with exitcode 1