[FIX] get root cert into the busybox

Dockerfile

@@ -1,5 +1,11 @@
+FROM alpine as certs
+RUN apk update && apk add ca-certificates
+
+
 FROM busybox:glibc
 
+COPY --from=certs /etc/ssl/certs /etc/ssl/certs
+
 # Get restic executable
 ENV RESTIC_VERION=0.8.1
 ADD https://github.com/restic/restic/releases/download/v${RESTIC_VERION}/restic_${RESTIC_VERION}_linux_amd64.bz2 /