Language and spec support

For each language and spec version identified, is there a corresponding Dockerfile to provide an appropriate environment to run against.

• Yes: Dockerfile available and builds successfully
• -: No Dockerfile found
• Error: Dockerfile found, but fails to build successfully

Language	v2	v3
broken	-	❌ Error
js	✅ Yes	✅ Yes
python	✅ Yes	✅ Yes