2020-12-10-docker_backup.sh folder fix

Dropbox are about to change API versions and discontinue the current API's in 2021.
The developer of Dropbox-Uploader has updated the project, it seems for this reason.
The default way the files are saved has been changed, hence this PR is need to fix that.
You will need to create a new dropbox_uploader.sh config file if not sone already ready for
the discontinuation of the old API. https://github.com/andreafabrizi/Dropbox-Uploader

Also updated Dropbox file retention to 30 which is more useful for restoring after an un-noticed issue.

Author: 877dev

scripts/docker_backup.sh

@@ -63,23 +63,23 @@ if [ -f ./backups/dropbox ]; then
 
 	#upload new backup to dropbox
 	echo "uploading to dropbox"
-	$dropboxuploader upload ./backups/$backupfile $backupfile
+	$dropboxuploader upload ./backups/$backupfile $dropboxfolder/$backupfile
 
-	#list older files to be deleted from cloud (exludes last 7)
-	#to change dropbox backups retained, change below -7 to whatever you want
+	#list older files to be deleted from cloud (exludes last 30)
+	#to change dropbox backups retained, change below -30 to whatever you want
 	echo "checking for old backups on dropbox"
-	files=$($dropboxuploader list $dropboxfolder | awk {' print $3 '} | tail -n +2 | head -n -7)
+	files=$($dropboxuploader list $dropboxfolder | awk {' print $3 '} | tail -n +2 | head -n -30)
 
 	#write files to be deleted to dropbox logfile
 	sudo touch $dropboxlog
 	sudo chown $USER:$USER $dropboxlog
 	echo $files | tr " " "\n" >$dropboxlog
 
 	#delete files from dropbox as per logfile
-	echo "deleting old backups from dropbox if they exist - last 7 files are kept"
+	echo "deleting old backups from dropbox if they exist - last 30 files are kept"
 
 	#check older files exist on dropbox, if yes then delete them
-	if [ $( echo "$files" | grep -c "backup") -ne 0 ] ; then	
+	if [ $( echo "$files" | grep -c "backup") -ne 0 ] ; then
 		input=$dropboxlog
 		while IFS= read -r file
 		do