introduced variables for hostname, user and mountpoint

ag-backup.yaml

@@ -3,9 +3,10 @@
 # For example, if you have a constant named "hostname" with the value
 # "myhostname", then the string "{hostname}" will be replaced with
 # "myhostname" in the configuration file.
-# constants:
-    # hostname: myhostname
-    # prefix: myprefix
+ constants:
+     hostname: ag-link.xyz
+     user: your-username-on-server 
+     mountpoint: /tmp/mnt/ag-link-server  
 
 # Where to look for files to backup, and where to store those backups.
 # See https://borgbackup.readthedocs.io/en/stable/quickstart.html and
@@ -15,7 +16,7 @@ location:
     # List of source directories to backup. Globs and tildes are
     # expanded. Do not backslash spaces in path names.
     source_directories:
-        - /tmp/mnt/ag-link-server/home/docker
+        - {mountpoint}/home/docker
 
     # Paths to local or remote repositories (required). Tildes are
     # expanded. Multiple repositories are backed up to in
@@ -390,7 +391,7 @@ hooks:
     # before creating a backup, run once per repository.
     before_backup:
         - mkdir -p /tmp/mnt/ag-link-server
-        - sshfs ag-link.xyz:/ /tmp/mnt/ag-link-server -o sftp_server='/usr/bin/sudo /usr/lib/openssh/sftp-server'
+        - sshfs {username}@{hostname}:/ /tmp/mnt/ag-link-server -o sftp_server='/usr/bin/sudo /usr/lib/openssh/sftp-server'
 
     # List of one or more shell commands or scripts to execute
     # before pruning, run once per repository.
@@ -415,7 +416,7 @@ hooks:
     # List of one or more shell commands or scripts to execute
     # after creating a backup, run once per repository.
     after_backup:
-        - fusermount -u /tmp/mnt/ag-link-server 
+        - fusermount -u {mountpoint} 
 
     # List of one or more shell commands or scripts to execute
     # after compaction, run once per repository.