# ── Stage 1: Build frontend ───────────────────────────────────────────────────
FROM node:20-alpine AS frontend-builder

WORKDIR /app/frontend
COPY frontend/package*.json ./
RUN npm ci
COPY frontend/ ./
RUN npm run build

# ── Stage 2: Build backend ────────────────────────────────────────────────────
FROM golang:1.22-alpine AS backend-builder

WORKDIR /app/backend
COPY backend/go.mod backend/go.sum ./
RUN go mod download
COPY backend/ ./
# CGO disabled — pure Go SQLite (modernc.org/sqlite).
RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o /archivum ./cmd/server

# ── Stage 3: Runtime image ────────────────────────────────────────────────────
FROM alpine:3.20

# Allow PUID/PGID override at runtime.
ARG PUID=1000
ARG PGID=1000

RUN addgroup -g "${PGID}" archivum \
 && adduser -u "${PUID}" -G archivum -s /sbin/nologin -D archivum

# Embed frontend into the binary's working directory.
COPY --from=frontend-builder /app/frontend/dist /srv/archivum/ui
COPY --from=backend-builder  /archivum            /usr/local/bin/archivum

# Volumes: config and data live outside the image.
VOLUME ["/config", "/data"]

ENV DOCKER_PATH=/config

USER archivum
EXPOSE 4000

ENTRYPOINT ["/usr/local/bin/archivum"]