Merge branch 'fix-nginx-caching' into 'develop'

Fix nginx caching issues

See merge request pleroma/pleroma!654

installation/pleroma.nginx

@@ -79,8 +79,10 @@ server {
         proxy_cache_valid  200 206 301 304 1h;
         proxy_cache_lock on;
         proxy_ignore_client_abort on;
-        proxy_buffering off;
+        proxy_buffering on;
         chunked_transfer_encoding on;
+        proxy_ignore_headers Cache-Control;
+        proxy_hide_header Cache-Control;
         proxy_pass http://localhost:4000;
     }
 }