Dockerfile

# Stage: base image
FROM node:22-bookworm-slim AS base

ARG BUILD_NUMBER=2022-01-07.1.ef03202
ARG GIT_REF=unknown

LABEL maintainer="HMPPS Digital Studio <info@digital.justice.gov.uk>"

ENV TZ=Europe/London
RUN ln -snf "/usr/share/zoneinfo/$TZ" /etc/localtime && echo "$TZ" > /etc/timezone

RUN addgroup --gid 2000 --system appgroup && \
    adduser --uid 2000 --system appuser --gid 2000

WORKDIR /app

# Cache breaking
ENV BUILD_NUMBER=${BUILD_NUMBER:-2022-01-07.1.ef03202}
ENV GIT_REF=${GIT_REF:-unknown}

RUN apt-get update && \
    apt-get upgrade -y && \
    apt-get autoremove -y && \
    rm -rf /var/lib/apt/lists/*

# Stage: build assets
FROM base AS build

ARG BUILD_NUMBER=2022-01-07.1.ef03202
ARG GIT_REF=unknown

COPY package*.json ./
RUN CYPRESS_INSTALL_BINARY=0 npm ci --no-audit
ENV NODE_ENV='production'

COPY . .
RUN npm run build
RUN npm prune --no-audit --omit=dev

# Stage: copy production assets and dependencies
FROM base

COPY --from=build --chown=appuser:appgroup \
    /app/package.json \
    /app/package-lock.json \
    ./

COPY --from=build --chown=appuser:appgroup \
    /app/dist ./dist

COPY --from=build --chown=appuser:appgroup \
    /app/node_modules ./node_modules

EXPOSE 3000
ENV NODE_ENV='production'
USER 2000

CMD [ "npm", "start" ]