Environment variables are used to set configuration options and pass data into programs that are being run in containers. They are essential for adjusting the container's behavior without changing the application's source code. Properly configured environment variables ensure that the application has all the necessary information, such as database connection strings or API keys, to operate correctly in different environments (development, testing, production, etc.). Misconfiguring these variables can lead to failures in application behavior or security issues.
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What are environment variables used for in containerized applications?
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How do environment variables differ from configuration files in containers?
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What happens if environment variables are misconfigured?