allow sftp backup

backup.sh

@@ -59,6 +59,23 @@ gpg --batch --trust-model always --enable-progress-filter --output ~/$BACKUP_FIL
 rm ~/$BACKUP_FILENAME
 
 echo "uploading"
+if [ "$USE_SFTP" -eq 1 ]; then
+  cd ~/
+  sshpass -e sftp -oBatchMode=no -b - ${SFTP_USER}@${SFTP_HOST} << !
+   cd ${SFTP_PATH}
+   put ${BACKUP_FILENAME}.gpg
+   bye
+!
+  if [ "$month_day" -eq 1 ] ; then
+    echo "make monthly backup"
+  sshpass -e sftp -oBatchMode=no -b - ${SFTP_USER}@${SFTP_HOST} << !
+   cd ${SFTP_PATH}
+   cp ${BACKUP_FILENAME}.gpg ${BACKUP_FILENAME_MONTHLY}.gpg
+   bye
+!
+  fi
+  rm ~/$BACKUP_FILENAME.gpg
+else
   AWS_ENDPOINT_OPTION=
   AWS_STORAGECLASS_OPTION="--storage-class DEEP_ARCHIVE"
   if  [ "$AWS_USE_MINIO" -eq 1 ] ; then