Clear it in 3 steps
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Start the environment
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Investigate the target
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Submit the flag
Investigate a `docker save`-style image record. The final `Config.Env` in `image_config.json` looks scrubbed, but layers are immutable. Inspect each layer's `created_by` command in `image_history.txt` and find the `DB_ADMIN_PASSWORD` value (the flag) left in plaintext in an intermediate `ARG`/`ENV`/`RUN` layer. Many decoy ENV vars (`NODE_ENV`, `APP_VERSION`, `FAKE_API_KEY`, ...) surround it.
Config.Env in image_config.json looks scrubbed, but layers are immutable
Inspect each layer's created_by command in image_history.txt one by one
The DB_ADMIN_PASSWORD value left in plaintext in an intermediate ARG/ENV/RUN layer is the flag