Fix hostname

start.py

@@ -1,12 +1,13 @@
 import os
 import subprocess
+import socket
 from pathlib import Path
 
 def to_volume_string(vol: str):
     return f"-v {vol}:/mnt/source{vol}:ro"
 
 def main():
-    hostname = "host"
+    hostname = socket.gethostname()
     container_name = "borgmatic"
     ssh_auth_sock = os.getenv("SSH_AUTH_SOCK")
     config_path = Path.cwd() / "data" / "borgmatic.d"