fix restore: create log path and file before chown call

see: https://ci-apps.yunohost.org/ci/job/636

README.md

@@ -70,6 +70,17 @@ To remove call e.g.:
 sudo yunohost app remove pyinventory
 ```
 
+Backup / remove / restore cycle, e.g.:
+```bash
+yunohost backup create --apps pyinventory
+yunohost backup list
+archives:
+  - pyinventory-pre-upgrade1
+  - 20201223-163434
+yunohost app remove pyinventory
+yunohost backup restore 20201223-163434 --apps pyinventory
+```
+
 Debug installation, e.g.:
 ```bash
 root@yunohost:~# ls -la /var/www/pyinventory/

scripts/restore

@@ -70,7 +70,6 @@ ynh_system_user_create --username=$app --home_dir="$final_path" --use_shell
 #=================================================
 
 # Restore permissions on app files
-chown -R "$app" "$log_path"
 chown -R "$app" "$public_path"
 chown -R "$app" "$final_path"
 
@@ -111,7 +110,9 @@ yunohost service add $app --description="Web based management to catalog things"
 # RESTORE THE LOGROTATE CONFIGURATION
 #=================================================
 
-mkdir -p "/var/log/$app"
+mkdir -p "$log_path"
+touch "${log_file}"
+chown -R "$app" "$log_path"
 ynh_restore_file --origin_path="/etc/logrotate.d/$app"
 
 #=================================================