index.html is cached for 6 hours #9796

If we don't specify anything, then browsers will make up some value. And chances
are that when we do change index.html, then browsers will not "see" it for a
while, possibly leading to mismatching JS and CSS or more severe issues.

From now on, index.html is cached for a maximum of 6 hours before re-validation.
That means if we release by night, browsers are naturally up-to-date in the
morning. And they use the cached version for most of the day.

configuration/nginx.conf

@@ -22,7 +22,7 @@ location ~ ^/(graphql|api/.*)$ {
 }
 
 # Cache static files for 6 hours
-location ~  \.(svg|jpg|jpeg|png|gif|ico|css|js|otf|eot|ttf|woff)$ {
+location ~ index.html|(\.(svg|jpg|jpeg|png|gif|ico|css|js|otf|eot|ttf|webp|woff))$ {
    expires 6h;
 }