delete some unused comments

config/nginx/conf.d/local.conf

@@ -1,8 +1,5 @@
 # adopted from https://pawamoy.github.io/2018/02/01/docker-compose-django-postgres-nginx.html
-# first we declare our upstream server, which is our bottle application
 upstream pypiserver {
-    # docker will automatically resolve this to the correct address
-    # because we use the same name as the service: "djangoapp"
     server pypiserver:8080;
 }