# syntax=docker/dockerfile:1

FROM node:20-alpine AS deps
WORKDIR /app

COPY package.json package-lock.json ./
RUN npm ci

FROM node:20-alpine AS builder
WORKDIR /app

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

# Allows configuring the API URL and auth at build time.
ARG NEXT_PUBLIC_API_URL=auto
ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
ARG NEXT_PUBLIC_AUTH_MODE
ENV NEXT_PUBLIC_AUTH_MODE=${NEXT_PUBLIC_AUTH_MODE}
ARG NEXT_PUBLIC_LOCAL_AUTH_TOKEN
ENV NEXT_PUBLIC_LOCAL_AUTH_TOKEN=${NEXT_PUBLIC_LOCAL_AUTH_TOKEN}

RUN npm run build

FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ARG NEXT_PUBLIC_AUTH_MODE
ARG NEXT_PUBLIC_LOCAL_AUTH_TOKEN

# If provided at runtime, Next will expose NEXT_PUBLIC_* to the browser as well
# (but note some values may be baked at build time).
ENV NEXT_PUBLIC_API_URL=auto
ENV NEXT_PUBLIC_AUTH_MODE=${NEXT_PUBLIC_AUTH_MODE}
ENV NEXT_PUBLIC_LOCAL_AUTH_TOKEN=${NEXT_PUBLIC_LOCAL_AUTH_TOKEN}

# Create non-root user before COPY so --chown can reference it.
RUN addgroup -S appgroup && adduser -S -G appgroup appuser

# Copy standalone output from builder
COPY --from=builder --chown=appuser:appgroup /app/.next/standalone ./
COPY --from=builder --chown=appuser:appgroup /app/.next/static ./.next/static
COPY --from=builder --chown=appuser:appgroup /app/public ./public

USER appuser

EXPOSE 3000

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