Added nginx configuration for uploading large sized blobs (layer size) to registry when using nginx as reverse proxy from monikakatiyar16

Signed-off-by: Monika Katiyar <monika@jeavio.com>

contrib/compose/nginx/docker-registry-v2.conf

@@ -4,3 +4,6 @@ proxy_set_header  X-Real-IP         $remote_addr; # pass on real client's IP
 proxy_set_header  X-Forwarded-For   $proxy_add_x_forwarded_for;
 proxy_set_header  X-Forwarded-Proto $scheme;
 proxy_read_timeout                  900;
+proxy_send_timeout            	    300; 
+proxy_request_buffering             off; (see issue #2292 - https://github.com/moby/moby/issues/2292)
+proxy_http_version                  1.1;