Introduction to Containers and CI/CD

Dependency Management

Docker Fundamentals

Environment Variables and Configuration

Python CI Pipeline

Azure Container Registry and Deployment

Practice

Assignment

Gotchas & Pitfalls

Week 5 Lesson Plan (Teachers)

Environment Variables and Configuration

Content coming soon...

Suggested Topics

• Why configuration should not be hardcoded in source code
• The twelve-factor app approach to configuration
• Using environment variables in Python: os.environ and os.getenv
• Passing environment variables to Docker: docker run -e and --env-file
• The .env file: local development convenience
• Keeping secrets out of version control: .gitignore and .env.example patterns
• Configuration hierarchy: defaults, .env files, environment variables, CLI arguments
• Validating configuration at startup: failing fast on missing required values
• Common configuration values for data apps: database URLs, API keys, log levels

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