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Pin Dockerfile base images to SHA256 digests

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Mutable tags on Docker Hub enable RCE during builds.
Pin to exact digests with version/date comments for auditability.
This commit is contained in:
Jeffrey Paul 2026-02-22 14:55:55 +01:00
parent e106dd5332
commit ca403e68d1
1 changed files with 4 additions and 2 deletions
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@ -1,11 +1,13 @@
FROM node:22-alpine AS build
# node:22-alpine as of 2026-02-22
FROM node@sha256:e4bf2a82ad0a4037d28035ae71529873c069b13eb0455466ae0bc13363826e34 AS build
WORKDIR /app
COPY package.json yarn.lock ./
RUN yarn install --frozen-lockfile
COPY . .
RUN yarn build
FROM nginx:stable-alpine
# nginx:stable-alpine as of 2026-02-22
FROM nginx@sha256:15e96e59aa3b0aada3a121296e3bce117721f42d88f5f64217ef4b18f458c6ab
# Remove default config
RUN rm /etc/nginx/conf.d/default.conf
# Custom nginx config: real_ip from RFC1918, access_log to stdout