FROM golang:1.26-alpine AS build
WORKDIR /src
COPY backend/go.mod backend/go.sum ./
RUN go mod download
COPY backend/ ./
RUN CGO_ENABLED=0 go build -trimpath -o /server ./cmd/server

FROM alpine:3.20
RUN adduser -D -H app
COPY --from=build /server /server
RUN mkdir -p /data/cache /data/books && chown app:app /data/cache /data/books
USER app
EXPOSE 8080
ENTRYPOINT ["/server"]