Reload nginx instead of restarting

If the restart of nginx fails (e.g. address already in use), the service will
not reload the configuration which is usually not wanted. By using nginx(1)
and telling it explicitly to reload the configuration, these issues do not
appear.

.infra/Freyfile.hcl

@@ -228,6 +228,10 @@ deploy {
       name    = "nginx | Create DH parameters"
       command = "openssl dhparam -out /etc/nginx/dhparams.pem 2048 creates=/etc/nginx/dhparams.pem"
     }
+    tasks {
+      name = "nginx | Start service"
+      service = "name=nginx state=started"
+    }
   }
 }
 
@@ -244,8 +248,8 @@ restart {
     hosts = "tusd"
     name  = "Restart nginx"
     tasks {
-      action = "service name=nginx state=restarted"
-      name   = "nginx | Restart"
+      name    = "nginx | Reload configuration"
+      command = "nginx -s reload"
     }
   }
 }