Pin the Docker image (#991)

IsaacG · web-flow · commit 6c8be3dd1694 · 2026-05-29T12:17:02.000+05:30
Exercism's policy is to prefer pinned versions.
Using the same hash across all runners allows us to store and reuse the same image, rather than needing to store a per-runner base image. This helps cut down on storage costs.
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:22-bookworm-slim AS runner
+FROM node:22-bookworm-slim@sha256:d415caac2f1f77b98caaf9415c5f807e14bc8d7bdea62561ea2fef4fbd08a73c AS runner
 # Node.js 22 (curently LTS)
 # Debian bookwork
 

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-FROM node:22-bookworm-slim AS runner`
	`1`	`+FROM node:22-bookworm-slim@sha256:d415caac2f1f77b98caaf9415c5f807e14bc8d7bdea62561ea2fef4fbd08a73c AS runner`
`2`	`2`	`# Node.js 22 (curently LTS)`
`3`	`3`	`# Debian bookwork`
`4`	`4`