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This example shows how to migrate a Python application to Docker Hardened Images.

The following examples show Dockerfiles before and after migration to Docker Hardened Images. Each example includes four variations:

• Before (Wolfi): A sample Dockerfile using Wolfi distribution images, before migrating to DHI
• Before (DOI): A sample Dockerfile using Docker Official Images, before migrating to DHI
• After (multi-stage): A sample Dockerfile after migrating to DHI with multi-stage builds (recommended for minimal, secure images)
• After (single-stage): A sample Dockerfile after migrating to DHI with single-stage builds (simpler but results in a larger image with a broader attack surface)

Note

Multi-stage builds are recommended for most use cases. Single-stage builds are supported for simplicity, but come with tradeoffs in size and security.

You must authenticate to dhi.io before you can pull Docker Hardened Images. Run docker login dhi.io to authenticate.