Merge pull request #1761 from lukapaunovic/patch-28

Update nginx.conf

install/debian/9/nginx/nginx.conf

@@ -51,6 +51,7 @@ http {
 
     # Compression
     gzip                on;
+    gzip_vary           on;
     gzip_comp_level     9;
     gzip_min_length     512;
     gzip_buffers        8 64k;