Docker and CI/CD · Junior · Question 31 of 75

How do you pass an environment variable when starting a container?

1docker build API_URL=https://api.example.com my-app
✓Correct answer: docker run -e API_URL=https://api.example.com my-app
3docker run --var API_URL=https://api.example.com my-app

Explanation

-e sets one variable and --env-file .env loads many. Configuration from the environment lets the same image run in every environment.

Further reading

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