Ensure postgres is available before running manage

example/manage.nomad.hcl

@@ -115,6 +115,7 @@ job "postgres-manage" {
         data        = <<_EOT
 LANG=fr_FR.utf8
 TZ=Europe/Paris
+WAIT_FOR_TARGETS=localhost:5432
 _EOT
         destination = "secrets/.env"
         perms       = 400

variables.yml

@@ -206,7 +206,8 @@ pg:
       - service: 'master.[[ .instance ]]'
 
     # Additional env var
-    env: {}
+    env:
+      WAIT_FOR_TARGETS: localhost:5432
 
     # Connection to postgres through the service mesg
     consul: