ci(docker): add missing ca-certificates and SSL certs copy (#2914)

Ensure ca-certificates are installed and copied to the base image
to support secure HTTPS connections where required.

Dockerfile

@@ -1,6 +1,6 @@
 FROM debian:bookworm-slim as builder
 
-RUN apt-get update && apt install -y git libtool automake autoconf make tini
+RUN apt-get update && apt install -y git libtool automake autoconf make tini ca-certificates
 
 RUN git clone https://github.com/Comcast/Infinite-File-Curtailer.git curtailer \
     && cd curtailer \
@@ -16,6 +16,8 @@ RUN git clone https://github.com/Comcast/Infinite-File-Curtailer.git curtailer \
 
 FROM debian:bookworm-slim as base
 
+COPY --from=builder /etc/ssl/certs /etc/ssl/certs
+
 COPY --from=builder /usr/bin/tini /tini
 ENTRYPOINT ["/tini", "--"]