Improve service file

Author: hsanjuan

roles/ipfs/templates/etc/systemd/system/ipfs.service

@@ -10,7 +10,8 @@ StateDirectory=ipfs
 LimitNOFILE={{ ipfs_fd_max }}
 MemorySwapMax=0
 Environment="IPFS_FD_MAX={{ ipfs_fd_max}}"
-ExecStart=/usr/local/bin/ipfs daemon --migrate
+ExecStart=/usr/local/bin/ipfs daemon --migrate {%- if ipfs_enable_gc | default(False) %} --enable-gc{% endif %}
+
 Restart=on-failure
 KillSignal=SIGINT