docker-project-foundations/assets/Dockerfile.simple

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# syntax=docker/dockerfile:1

# Stage 1: Install dependencies
FROM node:22-slim AS deps
WORKDIR /app
COPY --link package.json package-lock.json ./
# Private registries: docker buildx build --secret id=npmrc,src="$HOME/.npmrc" .
RUN --mount=type=secret,id=npmrc,target=/root/.npmrc,required=false \
    npm ci

# Stage 2: Development (used by compose with target: dev)
FROM deps AS dev
COPY --link . .
CMD ["npm", "run", "dev"]

# Stage 3: Build
FROM deps AS build
COPY --link . .
RUN npm run build

# Stage 4: Production
FROM node:22-slim AS production
WORKDIR /app

# Create non-root user
RUN groupadd --system appgroup && useradd --system --gid appgroup appuser

# Copy only what is needed to run
COPY --from=build /app/package.json /app/package-lock.json ./
RUN --mount=type=secret,id=npmrc,target=/root/.npmrc,required=false \
    npm ci --omit=dev
COPY --from=build /app/dist ./dist

USER appuser

EXPOSE 3000

ENTRYPOINT ["node"]
CMD ["dist/server.js"]