awkawbandClaude Sonnet 5
4c97391a33
Parameterizes tests/common.nix and tests/default.nix on proxyServer (default "nginx"), giving flake.nix two nixosConfigurations (test-nginx/test-caddy) and `just build-vm [proxy]` a way to pick between them for interactive testing. The automated nixosTest now boots one node per proxy backend and runs the full assertion suite (factored into check_invoiceninja()) against each, so a regression in either nginx or caddy's config gets caught. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>