[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 /

entry.sh

@@ -3,6 +3,12 @@ set -e
 
 echo "Starting container ..."
 
+RESTIC_CMD=restic
+
+if [ -n "${ROOT_CERT}" ]; then
+	RESTIC_CMD="${RESTIC_CMD} --cert ${ROOT_CERT}"
+fi
+
 if [ -n "${NFS_TARGET}" ]; then
     echo "Mounting NFS based on NFS_TARGET: ${NFS_TARGET}"
     mount -o nolock -v ${NFS_TARGET} /mnt/restic