docs: More help/usage

README.md

@@ -9,7 +9,24 @@ The included workflow that actually performs the backup can be manually run thro
 ## Usage
 
 ```sh
-$ /bin/bash scripts/backup.sh -r <repository> -b <branch> -d </path/to/data> [-n <commit limit>] [-v] [-x]
+$ scripts/backup.sh -h
+Usage: scripts/backup.sh [-r <repository url>] [-b <branch>] [-d <path dest>] [-n <num>] [-v] [-x] [-i] [-h]
+
+Ex: scripts/backup.sh \
+      -r https://github.com/descartes-underwriting/devops-technical-test-data.git \
+      -b main \
+      -d /home/mycroft/dev/private-backup/data
+
+Available flags:
+      -r <repository url> - set remote repository url (suffixed by .git) to backup
+      -b <branch> - branch to backup
+      -d </path/to/path> - where to backup; relative or absolute
+      -n <num> - number of commit to backup (default: unlimited)
+      -i - ignore tracking information - to restart from scratch
+      -v - verbose mode
+      -x - debug mode
+      -h - this help
+
 ```
 
 Ex: