Add grim dawn backup stuff

systemd/copy-grimdawn-save.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Copy Grim Dawn (the game) save for backup
+
+[Service]
+Type=oneshot
+Environment=GAME_PATH=%h"/games/gog/grim-dawn/drive_c/users/steamuser/Documents/My Games/Grim Dawn/"
+Environment=BACKUP_PATH=%h"/nextcloud/Games/Backups/Grim Dawn/"
+Environment="PASSPHRASE=a"
+ExecStart=duplicity backup --full-if-older-than 5D ${GAME_PATH} file://${BACKUP_PATH}
+ExecStart=duplicity remove-older-than 15D --force file://${BACKUP_PATH}

systemd/copy-grimdawn-save.timer

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+[Unit]
+Description=Copy Grim Dawn (the game) save for backup timer
+
+[Timer]
+OnCalendar=daily
+AccuracySec=10m
+OnStartupSec=5m
+Persistent=yes
+
+[Install]
+WantedBy=default.target