FROM node:22-alpine AS builder
WORKDIR /app

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

COPY . .

# Build-time version info — injected by docker-compose or CI via --build-arg.
ARG BUILD_VERSION=dev
ARG BUILD_COMMIT=unknown

# Expose as PUBLIC_ env vars so SvelteKit's $env/dynamic/public can read them.
ENV PUBLIC_BUILD_VERSION=$BUILD_VERSION
ENV PUBLIC_BUILD_COMMIT=$BUILD_COMMIT

RUN npm run build

# ── Runtime image ──────────────────────────────────────────────────────────────
# adapter-node bundles all dependencies into build/ — no npm install needed.
FROM node:22-alpine
WORKDIR /app

COPY --from=builder /app/build ./build

ENV NODE_ENV=production
ENV PORT=3000
ENV HOST=0.0.0.0

EXPOSE $PORT
CMD ["node", "build"]