Running SWT in docker containers for easier testing

[jonahgraham]

Yesterday, when trying to track down why #2804 was failing on Jenkins, but not locally or on GHA, I manually spun up some testing using the docker images that Jenkins uses to see if there was something about those docker images (eclipsecbi/jiro-agent-ubuntu-2404) that meant we weren't working on them.

This was not the first time I have tried to do that (manually copying command lines out of the launch configuration, setting up docker with the correct collection of port forwardings/mounts/etc). So, once I finished #2804 I decided it was time to formalize and document what I have done in the hope it helps me, and others in the future.

I am pretty pleased with it, and if you ever need to test SWT (or Eclipse) across different distros or docker images, I encourage you to have a look at my blog post and the repo I made that codifies these things https://github.com/jonahgraham/swt-dev-linux?tab=readme-ov-file

I have more work I plan to do (jonahgraham/swt-dev-linux#2), especially making it easy + quick to run on different window compositors (and window managers?), so testing issues like #2826 (comment) are easy too.

[fedejeanne]

Thank you, @jonahgraham ! I love this, I added it to my bookmarks 💪