s3mirror v1.0.3

Changes

• Publish s3mirror as a multi-architecture GHCR container image.
• Add Dockerfile, local container smoke-test targets, and PR container build validation.
• Update the website and README with container install and run instructions.
• Add Docker base image updates to Dependabot.
• Bump the application version to 1.0.3.

s3mirror v1.0.2

Changes

• Add the public GitHub Pages website for s3mirror.
• Move README resources to the root assets directory.
• Add website build, validation, deployment, and npm dependency automation.
• Bump the application version to 1.0.2.