I am looking to get a 20ft shipping container to use a workshop

Doing some research and the problem being a tin-can is that they can get very hot inside in summer and then in winter it can be prone to condensation inside

To prevent condensation people insulate the walls of the shipping containers on the inside with  pink batts then braced and covered with gib board

Also ventilation is key , like installing a "whirly bird" on the roof of the shipping container

I was wondering what if the insulation was on the outside of the shipping container using polystyrene insulation again the walls and roofs then braced and covered with plywood ,would this help with condensation and cooling ?

or

I was wondering what if the insulation was on the outside of the shipping container and there was a "air gap" between the polystyrene insulation and the shipping container

or

having the insulation on the outside defeats the purpose and won't work

Any idea?

(the reason for insulation on the outside is not loose the space on the interior walls to insulation)