fix (revert) regression causing docker connection refusal, introduced…

… by 899e101

the reason for this regression is not fully understood yet, probably related to some differences between the "manually" created final image on top of scratch and the updated one from the base images.

Dockerfile

@@ -18,12 +18,18 @@ RUN \
     echo "version=$version" && \
     cd app && go build -o /build/reproxy -ldflags "-X main.revision=${version} -s -w"
 
-FROM umputun/baseimage:scratch-latest
-# enables automatic changelog generation by tools like Dependabot
+
+FROM ghcr.io/umputun/baseimage/app:v1.12.0 as base
+
+FROM scratch
 LABEL org.opencontainers.image.source="https://github.com/umputun/reproxy"
 ENV REPROXY_IN_DOCKER=1
 
 COPY --from=backend /build/reproxy /srv/reproxy
+COPY --from=base /usr/share/zoneinfo /usr/share/zoneinfo
+COPY --from=base /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=base /etc/passwd /etc/passwd
+COPY --from=base /etc/group /etc/group
 
 WORKDIR /srv
 ENTRYPOINT ["/srv/reproxy"]