change docker-compose so that port 8000 is only exposed between containers. Also fix nginx volume so that it uses the correct nginx.conf file

docker-compose.yml

@@ -26,8 +26,8 @@ services:
       nofile:
         soft: 10000
         hard: 10000
-    ports:
-      - '8000:8000'
+    expose:
+      - '8000'
     # only use gunicorn if the TEST env variable is not "True"
     command: bash -c 'if [[ -z "${TEST}" && "${TEST}" = "True"  ]] ; then echo "starting test env"; else gunicorn --bind :8000 newsblur_web.wsgi:application; fi'
     volumes: 
@@ -50,7 +50,7 @@ services:
     environment: 
       - DOCKERBUILD=True
     volumes:
-    - ./docker/nginx:/etc/nginx/conf.d
+    - ./docker/nginx/nginx.local.conf:/etc/nginx/conf.d/nginx.conf
     - app-files:/srv/newsblur
 
   postgres: