nixos/redmine: Allow specifying an IP address Redmine should bind to

In order to not expose Redmine over all interfaces, allow configuring an
IP address it should bind to. Listen to 0.0.0.0 by default.

Signed-off-by: Felix Singer <felixsinger@posteo.net>

nixos/modules/services/misc/redmine.nix

@@ -74,6 +74,12 @@ in
         description = "Group under which Redmine is ran.";
       };
 
+      address = mkOption {
+        type = types.str;
+        default = "0.0.0.0";
+        description = "IP address Redmine should bind to.";
+      };
+
       port = mkOption {
         type = types.port;
         default = 3000;
@@ -429,7 +435,7 @@ in
         Group = cfg.group;
         TimeoutSec = "300";
         WorkingDirectory = "${cfg.package}/share/redmine";
-        ExecStart="${bundle} exec rails server -u webrick -e production -p ${toString cfg.port} -P '${cfg.stateDir}/redmine.pid'";
+        ExecStart="${bundle} exec rails server -u webrick -e production -b ${toString cfg.address} -p ${toString cfg.port} -P '${cfg.stateDir}/redmine.pid'";
       };
 
     };