Tweaked Platypush systemd service.

- A more informative Description
- `s/WantedBy=default.target/WantedBy=multi-user.target/`
- `redis.service` is a strong requirement

examples/systemd/platypush.service

@@ -1,22 +1,12 @@
-# platypush systemd service example.
-# Edit and copy this file to your systemd folder. It's usually
-# /usr/lib/systemd/user for global installation or
-# ~/.config/systemd/user for user installation. You can
-# then control and monitor the service through
-# systemd [--user] [start|stop|restart|status] platypush.service
-
 [Unit]
-Description=Platypush daemon
+Description=Platypush - A general-purpose platform for automation
 After=network.target redis.service
+Requires=redis.service
 
 [Service]
-# platypush installation path
 ExecStart=/usr/bin/platypush
 Restart=always
-# How long should be waited before restarting the service
-# in case of failure.
 RestartSec=10
 
 [Install]
-WantedBy=default.target
-
+WantedBy=multi-user.target