Docker Composer validation warnings

Problem / Motivation

Reported by the Lagoon build system

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Warning!
There are issues with your docker compose file that lagoon uses that should be fixed.
You can run docker compose config locally to check that your docker-compose file is valid.

> There are yaml validation errors in your docker-compose file that should be corrected.
ERR: yaml: unmarshal errors: line 59: mapping key "<<" already defined at line 58 line 81: mapping key "<<" already defined at line 80

Read the docs for more on errors displayed here https://docs.lagoon.sh/lagoon-build-errors

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STEP Docker Compose Validation: Completed at 2024-01-16 02:37:49 (UTC) Duration 00:00:01 Elapsed 00:00:03 WithWarnings
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