[systemd] Move to more generic python runners

systemd/.config/systemd/user/celery@.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Celery dev runner for %I
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+Environment=PATH=%h/.local/bin:/home/linuxbrew/.linuxbrew/bin:/usr/local/bin:/usr/bin:/bin
+EnvironmentFile=%h/.local/etc/django/%i.env
+ExecStart=/bin/bash -c 'cd "$DJANGO_PATH" && exec direnv exec "$DJANGO_PATH" celery -A "$CELERY_APP" worker'
+Restart=on-failure
+RestartSec=2
+StandardOutput=append:/tmp/celery.log
+StandardError=inherit
+
+[Install]
+WantedBy=default.target