slaprunner: wait for gunicorn socket to start

software/slaprunner/buildout.hash.cfg

@@ -18,7 +18,7 @@ md5sum = ec70348dd71b319590a5c5837f3d2e45
 
 [template-runner]
 filename = instance-runner.cfg
-md5sum = e7d59488e5f67011985211d775a9c499
+md5sum = bc2c65705d71325c0e7ba91e5c223335
 
 [template-runner-import-script]
 filename = template/runner-import.sh.jinja2

software/slaprunner/instance-runner.cfg

@@ -507,6 +507,8 @@ recipe = slapos.cookbook:wrapper
 command-line = $${directory:bin}/nginx-frontend
 wrapper-path = $${directory:services}/nginx-frontend
 hash-existing-files = $${buildout:directory}/software_release/buildout.cfg
+wait-for-files =
+  $${gunicorn:socket}
 
 [certificate-authority-service]
 recipe = slapos.cookbook:wrapper