python - Docker command with env var prepended (local env var) -


i using docker compose spin containers, don't command working. start flask server, set env var it. here's i've done:

web:   command: instasong_env=production python manage.py runserver

unfortunately, error:

cannot start container 2a413b1270b9faa5e0ffb8a70603ae25c48ff742e0d8476bed8153febcee185a: [8] system error: exec: "instasong_env=production": executable file not found in $path

how can make work?

setting environment variable might set differently, illustrated in tests/fixtures/extends/common.yml

web:   image: busybox   command: /bin/true   environment:     - foo=1     - bar=1

in case:

web:   command: python manage.py runserver   environment:     - instasong_env=production

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