nixos/mastodon: update elasticsearch configuration

    PAPERCLIP_ROOT_PATH = "/var/lib/mastodon/public-system";

    PAPERCLIP_ROOT_URL = "/system";

    ES_ENABLED = if (cfg.elasticsearch.host != null) then "true" else "false";

    ES_HOST = cfg.elasticsearch.host;

    ES_PORT = toString(cfg.elasticsearch.port);

    TRUSTED_PROXY_IP = cfg.trustedProxy;

  }

  // lib.optionalAttrs (cfg.database.host != "/run/postgresql" && cfg.database.port != null) { DB_PORT = toString cfg.database.port; }

  // lib.optionalAttrs cfg.smtp.authenticate { SMTP_LOGIN  = cfg.smtp.user; }

  // lib.optionalAttrs (cfg.elasticsearch.host != null) { ES_HOST = cfg.elasticsearch.host; }

  // lib.optionalAttrs (cfg.elasticsearch.host != null) { ES_PORT = toString(cfg.elasticsearch.port); }

  // lib.optionalAttrs (cfg.elasticsearch.host != null) { ES_PRESET = cfg.elasticsearch.preset; }

  // lib.optionalAttrs (cfg.elasticsearch.user != null) { ES_USER = cfg.elasticsearch.user; }

  // cfg.extraConfig;

  systemCallsList = [ "@cpu-emulation" "@debug" "@keyring" "@ipc" "@mount" "@obsolete" "@privileged" "@setuid" ];

          type = lib.types.port;

          default = 9200;

        };

        preset = lib.mkOption {

          description = lib.mdDoc ''

            It controls the ElasticSearch indices configuration (number of shards and replica).

          '';

          type = lib.types.enum [ "single_node_cluster" "small_cluster" "large_cluster" ];

          default = "single_node_cluster";

          example = "large_cluster";

        };

        user = lib.mkOption {

          description = lib.mdDoc "Used for optionally authenticating with Elasticsearch.";

          type = lib.types.nullOr lib.types.str;

          default = null;

          example = "elasticsearch-mastodon";

        };

        passwordFile = lib.mkOption {

          description = lib.mdDoc ''

            Path to file containing password for optionally authenticating with Elasticsearch.

          '';

          type = lib.types.nullOr lib.types.path;

          default = null;

          example = "/var/lib/mastodon/secrets/elasticsearch-password";

        };

      };

      package = lib.mkOption {

        DB_PASS="$(cat ${cfg.database.passwordFile})"

      '' + lib.optionalString cfg.smtp.authenticate ''

        SMTP_PASSWORD="$(cat ${cfg.smtp.passwordFile})"

      '' + lib.optionalString (cfg.elasticsearch.passwordFile != null) ''

        ES_PASS="$(cat ${cfg.elasticsearch.passwordFile})"

      '' + ''

        EOF

      '';