Dockerfile

# Next.js standalone build. Vercel is the primary target; this is for self-hosting.
FROM node:22-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
ARG NEXT_PUBLIC_API_URL
ARG NEXT_PUBLIC_VAPID_PUBLIC_KEY
ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
ENV NEXT_PUBLIC_VAPID_PUBLIC_KEY=${NEXT_PUBLIC_VAPID_PUBLIC_KEY}
ENV NEXT_TELEMETRY_DISABLED=1
RUN npm run build

FROM node:22-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
ENV PORT=3001
COPY --from=builder /app/public ./public
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

# Drop root, as the API's image already does. The server reads what it serves
# and writes nothing, so an unprivileged user is enough — and a process that
# never needs root should not be handed it.
USER node

EXPOSE 3001
CMD ["node", "server.js"]