roles/nginx: Update gzip compression types

Latest from the HTML 5 Boilerplate project, see:

https://github.com/h5bp/server-configs-nginx/blob/master/nginx.conf

roles/nginx/files/nginx.conf

@@ -61,7 +61,33 @@ http {
     gzip_min_length 860;
     gzip_disable "msie6";
     gzip_http_version 1.1;
-    gzip_types text/plain text/css text/xml application/rss+xml application/javascript image/svg+xml;
+    # Compress all output labeled with one of the following MIME-types.
+    gzip_types
+      application/atom+xml
+      application/javascript
+      application/json
+      application/ld+json
+      application/manifest+json
+      application/rss+xml
+      application/vnd.geo+json
+      application/vnd.ms-fontobject
+      application/x-font-ttf
+      application/x-web-app-manifest+json
+      application/xhtml+xml
+      application/xml
+      font/opentype
+      image/bmp
+      image/svg+xml
+      image/x-icon
+      text/cache-manifest
+      text/css
+      text/plain
+      text/vcard
+      text/vnd.rim.location.xloc
+      text/vtt
+      text/x-component
+      text/x-cross-domain-policy;
+    # text/html is always compressed by gzip module
 
     client_max_body_size 12m;