Configure cache for static assets, HTML pages, and page-data (#606)

nginx.conf

@@ -48,9 +48,24 @@ server {
 
     root /usr/share/nginx;
     location / {
+        expires 0;
+        add_header Cache-Control "public, must-revalidate";
         try_files /htmlv2/$uri /html/$uri /htmlv2/$uri/index.html /html/$uri/index.html =404;
     }
 
+    location ^~ /static/ {
+        expires max;
+        add_header Cache-Control "public, immutable";
+        try_files /htmlv2/$uri =404;
+    }
+
+    location ^~ /page-data/ {
+        # page-data.json and app-data.json files shoud be revalidated on every request
+        expires 0;
+        add_header Cache-Control "public, must-revalidate";
+        try_files /htmlv2/$uri /html/$uri =404;
+    }
+
     location /robots.txt {
         alias /usr/share/nginx/html/robots/robots.txt;
     }