add ca-certificates

add ca-certificates

diff --git a/Dockerfile b/Dockerfile
index 9b0fe28..a5cedae 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,6 +3,7 @@ FROM debian:buster-slim
 RUN DEBIAN_FRONTEND=noninteractive apt-get update \
   && DEBIAN_FRONTEND=noninteractive apt-get dist-upgrade -y \
   && DEBIAN_FRONTEND=noninteractive apt-get -y install --no-install-recommends \
+    ca-certificates \
     curl \
     gdb \
     jq \

GitHub sha: ba1d276b4acdd29a619219e43cfc508228e73b3d