Is it possible to have an offline Gambas Development Environment?

[Claus Dietrich <claus.dietrich@xxxxxxxxxx>]

For various reasons  I decided to setup and freeze a development 
environment at Gambas version 3.20.2 which doesn't require external 
resources and can be used offline.

So I generated a VM based on Mint 20.3 Mate which is not supported any 
longer and installed Gambas 3.20.2 from source on it. As next I wanted 
to have an offline help. So I activated the configuration switch for the 
offline help in the IDE which started the download of the help. The 
result was negative, because the offline help text is partially covered 
by other fixed white text and the contents is more or less useless. Have 
I done anything wrong?

As next I installed the AppImage Builder and generated a GnuPG signature 
key and had a look at the resources required for generating AppImages. 
It consists of the huge Ubuntu Repository at 
"http://archive.ubuntu.com/ubuntu"; and the Gambas resource from the dead 
ppa ("http://ppa.launchpad.net/gambas-team/gambas3/ubuntu/";). Is there a 
way to replicate only those web resources, which are really needed as a 
local offline resource? Do I need a http server for it?

Any related experience and suggestion would be welcome.

Best regards

Claus