docs.docker.com/compose/how-tos/environment-variables/variable-interpolation, docs.docker.com/compose/how-tos/environment-variables/variable-interpolation/

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docs.docker.com/compose/how-tos/environment-variables/variable-interpolation 1 route

Use variable interpolation with defaults, required-value, and alternate-value forms in a Compose file
7 steps · 3 gotchas · unrated

docs.docker.com/compose/how-tos/environment-variables/variable-interpolation/ 2 routes

Manage Docker Compose variables with the .env file and --env-file per-environment overrides
5 steps · 3 gotchas · unrated
Use variable interpolation with defaults and required checks in a Docker Compose file (${VAR:-default}, ${VAR:?error})
5 steps · 3 gotchas · unrated
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