build(devcontainer): switch to JDK 8 (for Corda v4) and Node 20 LTS

[petermetz]

1. Also performed a minor upgrade of the golang compiler version
   because the version we were using had a bug in it (compiler bug)

[skip ci]

Signed-off-by: Peter Somogyvari [email protected]

Pull Request Requirements

• Rebased onto upstream/main branch and squashed into single commit to help maintainers review it more efficient and to avoid spaghetti git commit graphs that obfuscate which commit did exactly what change, when and, why.
• Have git sign off at the end of commit message to avoid being marked red. You can add -s flag when using git commit command. You may refer to this link for more information.
• Follow the Commit Linting specification. You may refer to this link for more information.

Character Limit

• Pull Request Title and Commit Subject must not exceed 72 characters (including spaces and special characters).
• Commit Message per line must not exceed 80 characters (including spaces and special characters).

A Must Read for Beginners
For rebasing and squashing, here's a must read guide for beginners.

[outSH]

@petermetz Why move to Node 20 LTS while 18 LTS is still supported? I think it's better to use 18 to ensure compatibility of any new changes with it, or is there a specific reason to use 20?

Sorry, I missed @outSH 's comment. I will approve after this comment issue is resolved.

[petermetz]

@petermetz Why move to Node 20 LTS while 18 LTS is still supported? I think it's better to use 18 to ensure compatibility of any new changes with it, or is there a specific reason to use 20?

@outSH No strong feelings in either direction TBH (I could argue for both 18 and 20) so I'll switch it to 18!

[petermetz]

Sorry, I missed @outSH 's comment. I will approve after this comment issue is resolved.

@takeutak No worries and thank you for the review! I just made the changes to accommodate the feedback from @outSH !