FROM alpine:3.20

ARG TARGETPLATFORM

WORKDIR /app

# Install ca-certificates for HTTPS and tzdata for timezone support
RUN apk add --no-cache ca-certificates su-exec tzdata

# Copy pre-built binary from GoReleaser (platform-specific path)
COPY ${TARGETPLATFORM}/attic /app/attic
COPY --chmod=755 backend/docker-entrypoint.sh /app/docker-entrypoint.sh

# Create the numeric non-root user Kubernetes verifies for runAsNonRoot.
RUN addgroup -g 1000 appgroup \
    && adduser -D -u 1000 -G appgroup appuser \
    && mkdir -p /data/uploads \
    && chown appuser:appgroup /data/uploads

# Expose port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8080/health || exit 1

# Use a numeric UID/GID so runtimes can enforce runAsNonRoot before startup.
USER 1000:1000

# Run the binary
ENTRYPOINT ["/app/docker-entrypoint.sh"]
CMD ["/app/attic"]