it is a WEB APPLICATION
As far as I know (which is not saying much!),
all the "templates", at least in this Forum, all "
run on a computer". It's
just not the user's computer. The users literally see the output of the dozens, even hundreds of php/javascript/html/etc. files/apps of the "template" in a browser.
However, the unfortunately (in my opinion) named "template.txt" file
must be installed on a computer, preferably one running WeatherCat. WeatherCat is a program, of course, but it can take that text file (actually, almost any file) which contains the WC "tags" the "template" collection needs, and upload a file with the actual values that the host computer running the "template" applications can use.
I'm not sure that we "need to understand" how any of your scripts/plugins/containers/files/templates/etc. work of where they are actually running! Nor are there any here who care what hardware or OS you are using. I wish you had more up-to-date stuff, even a second or third machine with tins of memory and storage space, but with the talent you have demonstrated, I think that will come!
Hope you've received my output file by now. I didn't want to waste forum space for such temporary files.