tnx but it can be done or not ?
or can find guide step by step ?
If you actually read the documentation, you would know that you can indeed install a jail.
Outside of installing the jail in freenas, everything about installing a webserver inside a jail can be inferred by following just about any guide to installing a webserver in freebsd, as the jail is just running a plain freebsd install.
There is nothing related to freenas at this point.
I agree that I don't think you should be exposing this to the internet, based on the questions you are asking. You have some homework to do.