From 1d71495907c8f377198143b8742219a86ef73024 Mon Sep 17 00:00:00 2001
From: Isaac Good <github@isaacgood.com>
Date: Thu, 7 May 2026 23:22:07 -0700
Subject: [PATCH] Pin the Docker image

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.
---
 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index a6e50fa..e80384b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:22.04
+FROM ubuntu:22.04@sha256:962f6cadeae0ea6284001009daa4cc9a8c37e75d1f5191cf0eb83fe565b63dd7
 
 RUN apt-get update && \
     apt-get install -y coreutils wget zip libfontconfig1 && \