FROM node:20-alpine AS builder
WORKDIR /app

# Accept build-time env vars
ARG NEXT_PUBLIC_API_URL=
ARG NEXT_PUBLIC_WS_URL=
ARG NEXT_PUBLIC_BASE_PATH=
ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
ENV NEXT_PUBLIC_WS_URL=$NEXT_PUBLIC_WS_URL
ENV NEXT_PUBLIC_BASE_PATH=$NEXT_PUBLIC_BASE_PATH

COPY package.json package-lock.json* ./
RUN npm ci
COPY . .
RUN npm run build

FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production

COPY --from=builder /app/public ./public
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

EXPOSE 3000
CMD ["node", "server.js"]