Install systemd unit into XDG_CONFIG_HOME/systemd/user

Signed-off-by: Samir Benmendil <me@rmz.io>

podman_compose.py

@@ -1742,7 +1742,7 @@ def compose_systemd(compose, args):
  """
  create systemd unit file and register its compose stacks
 
- When first installed type `sudo podman-compose -a create-unit`
+ When first installed type `podman-compose -a create-unit`
  later you can add a compose stack by running `podman-compose -a register`
  then you can start/stop your stack with `systemctl --user start podman-compose@<PROJ>`
  """
@@ -1789,7 +1789,7 @@ def compose_systemd(compose, args):
  for i in ls:
  print(os.path.basename(i[:-4]))
  elif args.action == "create-unit":
- fn = "/usr/lib/systemd/user/podman-compose@.service"
+ fn = f"{config_home}/systemd/user/podman-compose@.service"
  out = f"""\
 # {fn}
 
@@ -1819,7 +1819,7 @@ def compose_systemd(compose, args):
  )
  else:
  print(out)
- log(f"Could not write to [{fn}], use 'sudo'")
+ log(f"Could not write to [{fn}]")
 
 
 @cmd_run(podman_compose, "pull", "pull stack images")