Fix log configuration

Fix warning:

Failed to load writer mode "router" for logger router: invalid log writer type (mode): router, maybe it needs something like 'MODE=file' in [log.router] section
Failed to load writer mode "xorm" for logger xorm: invalid log writer type (mode): xorm, maybe it needs something like 'MODE=file' in [log.xorm] section

Fix log level in file because:
- warning level break startup service detection (with ynh_systemd_action)
- warning level break fail2ban

conf/app.ini

@@ -83,13 +83,15 @@ MACARON             = file
 
 [log.file]
 FILE_NAME = gitea.log
-LEVEL = Warn
+LEVEL = Info
 
 [log.router]
+MODE = file
 FILE_NAME = router.log
 LEVEL = Warn
 
 [log.xorm]
+MODE = file
 FILE_NAME = xorm.log
 LEVEL = Warn