ci: 🐛 add ca-certificates

Author: Koro33

Dockerfile

@@ -19,6 +19,9 @@ RUN cargo build --release
 
 # Second stage putting the build result into a debian jessie-slim image
 FROM debian:stable-slim
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 COPY --from=rust-builder /build/target/release/s-backup /usr/local/bin/
 WORKDIR /usr/local/bin
 CMD ["s-backup"]