WRF content to update

[paolap]

I get the feeling that lots of this content is obsolete, and so there's more work to be doneI'm not sure how much the updates are useful still and there's a page on how to run WRF with ERAI but not ERA5. Also the netcdf file page is so short can probably be integrated with the tips page.
We should also consider that the tips is very similar content to the FAQS so that might be a better place for it?? Or at least we should be consistent with whatever we will do for the other models.