Dockerfile

FROM node:lts-alpine AS base

# Install dependencies only when needed
FROM base AS deps

# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Install dependencies based on the preferred package manager
COPY package.json yarn.lock* ./
RUN \
    if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
    else echo "Lockfile not found." && exit 1; \
    fi

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Next.js collects completely anonymous telemetry data about general usage.
# Learn more here: https://nextjs.org/telemetry
ENV NEXT_TELEMETRY_DISABLED=1

RUN \
    if [ -f yarn.lock ]; then yarn run build; \
    else echo "Lockfile not found." && exit 1; \
    fi

# Create a minimal production image
FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 aquamaster
USER aquamaster

COPY --from=builder /app/public ./public

# Automatically leverage output traces to reduce image size
# https://nextjs.org/docs/advanced-features/output-file-tracing
COPY --from=builder --chown=aquamaster:nodejs /app/.next/standalone ./
COPY --from=builder --chown=aquamaster:nodejs /app/.next/static ./.next/static

CMD ["node", "server.js"]