mega-plant/Dockerfile

# syntax=docker/dockerfile:1.7
#
# Production image for MEGA PLANT — designed for Coolify.
#
# Multi-stage build:
#   1. deps    — fetch and cache npm dependencies
#   2. builder — compile the Next.js standalone bundle
#   3. runner  — minimal runtime image with just the standalone server
#
# The container listens on ${PORT:-3000} and binds 0.0.0.0 so Coolify's
# Traefik proxy can reach it. /api/health is the liveness probe.
#
# IMPORTANT — NEXT_PUBLIC_PB_URL must be passed as a BUILD ARG, not just a
# runtime variable. Next.js inlines NEXT_PUBLIC_* into the client bundle at
# build time; setting it only at runtime leaves the browser pointing at
# whatever was baked in. See COOLIFY.md.

# ---------------------------------------------------------------------------
# 1. deps
# ---------------------------------------------------------------------------
FROM node:20-alpine AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Copy only the manifest + lockfile so this layer stays cached for as long
# as dependencies don't change.
COPY package.json package-lock.json* ./
RUN npm ci --no-audit --no-fund

# ---------------------------------------------------------------------------
# 2. builder
# ---------------------------------------------------------------------------
FROM node:20-alpine AS builder
WORKDIR /app

COPY --from=deps /app/node_modules ./node_modules
COPY . .

# The PocketBase URL is compiled into the client bundle here. Fail loudly
# rather than shipping an image that silently talks to the wrong database.
ARG NEXT_PUBLIC_PB_URL
ENV NEXT_PUBLIC_PB_URL=${NEXT_PUBLIC_PB_URL}
RUN test -n "$NEXT_PUBLIC_PB_URL" \
 || (echo "" \
  && echo "ERROR: build arg NEXT_PUBLIC_PB_URL is required." \
  && echo "  Coolify -> Build -> Build Arguments -> NEXT_PUBLIC_PB_URL=https://pb.mega.plant.example" \
  && echo "  Local:   docker build --build-arg NEXT_PUBLIC_PB_URL=https://... ." \
  && echo "" && exit 1)

ENV NEXT_TELEMETRY_DISABLED=1
ENV NODE_ENV=production

# `next build --webpack` is deliberate: @ducanh2912/next-pwa is Webpack-only
# and is what generates public/sw.js + public/workbox-*.js. Dropping the flag
# silently ships an app with no service worker and no offline install.
RUN npm run build

# ---------------------------------------------------------------------------
# 3. runner
# ---------------------------------------------------------------------------
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1
ENV PORT=3000
ENV HOSTNAME=0.0.0.0

RUN addgroup --system --gid 1001 nodejs \
 && adduser --system --uid 1001 nextjs

# Static assets — includes the manifest, icons, and the service worker that
# next-pwa generated during the build.
COPY --from=builder /app/public ./public

# `output: "standalone"` produces server.js plus a trimmed node_modules, but
# does NOT include .next/static — that has to be copied in separately.
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

# Next's output tracer cannot see pdfjs-dist's worker. The only reference to it
# is a createRequire(...).resolve() call, which the tracer does not follow, so
# the standalone bundle ships pdf.mjs WITHOUT pdf.worker.mjs — and every parse
# then dies with "Setting up fake worker failed: Cannot find module
# '/app/node_modules/pdfjs-dist/legacy/build/pdf.worker.mjs'". Copy the package
# in whole: the worker has to sit next to pdf.mjs at runtime, and so do the
# standard fonts, which the parser needs because it passes useSystemFonts.
COPY --from=deps --chown=nextjs:nodejs /app/node_modules/pdfjs-dist ./node_modules/pdfjs-dist

USER nextjs
EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
  CMD wget -q --spider http://127.0.0.1:3000/api/health || exit 1

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