fix: pin Docker base image to SHA256 digest#106
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Pin alpine base image to alpine:3.23.3 with SHA256 digest to ensure reproducible and secure builds, resolving code scanning alert #3. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
jmeridth
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Mar 10, 2026
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Pull request overview
This PR addresses a GitHub code-scanning alert by making the Docker build reproducible and more supply-chain resilient through pinning the base image to an immutable digest.
Changes:
- Pin
FROM alpinetoalpine:3.23.3@sha256:...to avoid floating-tag drift and ensure deterministic base image resolution.
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Summary
Resolves code scanning alert #3 — Docker image not pinned to SHA256 digest.
Changes
Pins the Dockerfile
FROM alpinetoalpine:3.23.3@sha256:25109184c71b...to ensure reproducible and secure builds. Unpinned tags likealpine(implicitlylatest) can change without notice, leading to non-deterministic builds and potential supply chain vulnerabilities.Testing
This is a placeholder Dockerfile that packages the repo files into a container image. The change only pins the base image version — no functional change.