Create sudoer

Allow only some commands to run as root

conf/sudoer

@@ -0,0 +1 @@
+__APP__ ALL=(root) NOPASSWD: /usr/bin/yunohost backup create *, /usr/bin/yunohost backup restore *, /usr/bin/yunohost backup delete *, /usr/bin/yunohost app list *, /usr/bin/yunohost app remove *, /bin/ls