Update Dockerfile

Dockerfile

@@ -4,10 +4,13 @@ USER root
 
 RUN apk update && \
     apk add --no-cache ca-certificates && \
-    if [ -x /usr/sbin/update-ca-certificates ]; then update-ca-certificates; \
+    rm -rf /var/cache/apk/*
+
+COPY ca.pem /usr/local/share/ca-certificates/aiven-custom-ca.crt
+
+RUN if [ -x /usr/sbin/update-ca-certificates ]; then update-ca-certificates; \
     elif [ -x /sbin/update-ca-certificates ]; then update-ca-certificates; \
-    else echo "update-ca-certificates not found, assuming apk handled it."; fi && \
-    echo "CA certificates update process attempted."
+    else echo "update-ca-certificates not found or not executed."; fi
 
 RUN mkdir -p /data && \
     chown -R 1000:1000 /data