Dockerfile

# ---- base ----
FROM node:22-alpine AS base
WORKDIR /app

# ---- deps ----
FROM base AS deps
COPY package.json package-lock.json ./
RUN npm ci

# ---- dev ----
FROM base AS dev
COPY --from=deps /app/node_modules ./node_modules
COPY . .
EXPOSE 3000
CMD ["npm", "run", "dev"]

# ---- builder ----
FROM base AS builder
COPY --from=deps /app/node_modules ./node_modules
COPY . .
ENV NEXT_TELEMETRY_DISABLED=1
RUN npm run build

# ---- runner (production, self-hosted) ----
# Note: primary deployment target is Vercel. This stage is for self-hosted use only.
FROM node:22-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

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

COPY --from=builder --chown=nextjs:nodejs /app/public ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next ./.next
COPY --from=builder --chown=nextjs:nodejs /app/node_modules ./node_modules
COPY --from=builder --chown=nextjs:nodejs /app/package.json ./package.json

USER nextjs
EXPOSE 3000
ENV PORT=3000
ENV HOSTNAME="0.0.0.0"
CMD ["node_modules/.bin/next", "start"]