Add wget path.

software/erp5/instance-varnish.cfg

@@ -52,7 +52,7 @@ web-checker-config = $${rootdirectory:etc}/web_checker.cfg
 web-checker-working-directory = $${directory:web-checker}
 # for now frontend-url is varnish, it will replace with the real front-end one.
 frontend-url = $${varnish-instance:ip}:$${varnish-instance:server-port}
-wget-binary-path =
+wget-binary-path = ${wget:location}/bin/wget
 varnishlog-binary-path = $${varnish-instance:varnishlog-wrapper}
 web-checker-log = $${basedirectory:log}/web-checker.log