nodered: mount its settings where the image's health check reads them

The image's /healthcheck.js requires /data/settings.js, so with the mesh's
settings mounted at /config the container ran fine but reported unhealthy
forever. Mount the same file at /data/settings.js and point --settings there.

modules/nodered/module.json

@@ -75,11 +75,11 @@
       ],
       "args": [
         "--settings",
-        "/config/settings.js"
+        "/data/settings.js"
       ],
       "volumes": [
         "${dir:data}:/data",
-        "${dir:state}/settings.js:/config/settings.js:ro",
+        "${dir:state}/settings.js:/data/settings.js:ro",
         "${dir:state}/settings.json:/config/settings.json:ro"
       ],
       "restart-on": [