nixos-config/hosts/falkenstein-1/modules/nginx/default.nix

{ config, lib, ... }:
{
  # set default options for virtualHosts
  options = with lib; {
    services.nginx.virtualHosts = mkOption {
      type = types.attrsOf (types.submodule
        ({ name, ... }: {
          # split up nginx access logs per vhost
          extraConfig = ''
            access_log /var/log/nginx/${name}_access.log;
            error_log /var/log/nginx/${name}_error.log;
          '';
        })
      );
    };
  };
  config =
    let
      # matrix homeserver discovery
      matrix_domain = "matrix.${config.networking.domain}";
      serverConfig = {
        "m.server" = "${matrix_domain}:443";
      };
      clientConfig = {
        "m.homeserver" = {
          base_url = "https://${matrix_domain}";
          # server_name = config.networking.domain;
        };
        "org.matrix.msc3575.proxy" = {
          url = "https://${matrix_domain}";
        };
      };
      mkWellKnown = data: ''
        add_header Content-Type application/json;
        add_header Access-Control-Allow-Origin *;
        return 200 '${builtins.toJSON data}';
      '';
    in
    {
      networking.firewall.allowedTCPPorts = [ 80 443 ];
      services.nginx = {
        enable = true;
        recommendedTlsSettings = true;
        recommendedProxySettings = true;
        recommendedGzipSettings = true;
        recommendedOptimisation = true;

        virtualHosts."${config.networking.domain}" = {
          enableACME = true;
          forceSSL = true;
          root = "/srv/web/${config.networking.domain}";
          locations."/.well-known/matrix/client".extraConfig = mkWellKnown clientConfig;
          locations."/.well-known/matrix/server".extraConfig = mkWellKnown serverConfig;
        };
      };
      security.acme = {
        acceptTerms = true;
        defaults = {
          email = "rouven@${config.networking.domain}";
        };
      };
    };
}