Andras Bacsai 1ab5dbca20 fix: preserve empty strings and remove empty sections in docker-compose ...

- Preserve empty string environment variables instead of converting to null
  Empty strings and null have different semantics in Docker Compose:
  * Empty string (VAR: ""): Variable is set to "" in container (e.g., HTTP_PROXY="" means "no proxy")
  * Null (VAR: null): Variable is unset/removed from container environment

- Remove empty top-level sections (volumes, configs, secrets) from generated compose files
  These sections now only appear when they contain actual content, following Docker Compose best practices

- Add safety check for missing volumes in validateComposeFile to prevent iteration errors

- Add comprehensive unit tests for both fixes

Fixes #7126

2025-11-06 12:30:03 +01:00

6.2 KiB

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