Define nginx v2 vhost & properly set 404 status code

Fixes #777

conf/server-base.conf

@@ -63,6 +63,27 @@ location /v1/ {
     client_max_body_size 20G;
 }
 
+location /v1/_ping {
+    add_header Content-Type text/plain;
+    add_header X-Docker-Registry-Version 0.6.0;
+    add_header X-Docker-Registry-Standalone 0;
+    return 200 'true';
+}
+
+location /v2/ {
+    proxy_buffering off;
+
+    proxy_request_buffering off;
+
+    proxy_http_version 1.1;
+    proxy_set_header Connection "";
+
+    proxy_pass   http://registry_app_server;
+    proxy_temp_path /tmp 1 2;
+
+    client_max_body_size 20G;
+}
+
 location /c1/ {
     proxy_buffering off;
 
@@ -80,13 +101,6 @@ location /static/ {
     error_page 404 /404;
 }
 
-location /v1/_ping {
-    add_header Content-Type text/plain;
-    add_header X-Docker-Registry-Version 0.6.0;
-    add_header X-Docker-Registry-Standalone 0;
-    return 200 'true';
-}
-
 location ~ ^/b1/controller(/?)(.*) {
     proxy_pass http://build_manager_controller_server/$2;
 }

endpoints/web.py

@@ -61,7 +61,9 @@ def internal_error_display():
 @web.errorhandler(404)
 @web.route('/404', methods=['GET'])
 def not_found_error_display(e = None):
-  return render_page_template('404.html')
+  resp = render_page_template('404.html')
+  resp.status_code = 404
+  return resp
 
 @web.route('/organization/<path:path>', methods=['GET'])
 @no_cache