core: frontend: add cache headers for logviewer and assets folder

core/tools/nginx/nginx.conf

@@ -133,6 +133,7 @@ http {
 
         location ^~ /logviewer {
             # ^~ makes this a higher priority than locations with regex
+            expires 10d;
             root /home/pi/tools;
         }
 
@@ -217,6 +218,14 @@ http {
             autoindex_format json;
         }
 
+        location /assets/ {
+            root /home/pi/frontend/assets;
+            autoindex on;
+            # allow frontend to see files using json
+            autoindex_format json;
+            expires 5d; # built files have a hash, so we shouldn't have issues with old cache
+        }
+
         location ~ ^/upload(/.*)$ {
             client_max_body_size 100M;
             alias /usr/blueos$1;