Fix chaching and rewrite locations

nginx.conf

@@ -1,4 +1,4 @@
-proxy_cache_path /var/nginx/cache keys_zone=mycache:10m;
+proxy_cache_path /var/nginx/cache keys_zone=default_cache:10m max_size=2g;
 server {
     listen       8080;
     listen  [::]:8080;
@@ -7,12 +7,22 @@ server {
 
     server_name  localhost;
 
-    proxy_cache mycache;
+    proxy_cache default_cache;
+    proxy_cache_key $scheme$proxy_host$uri;
 
-    proxy_ignore_headers "Set-Cookie";
-    proxy_hide_header "Set-Cookie";
+    proxy_buffering on;
 
-    proxy_cache_key $scheme$proxy_host$uri;
+    proxy_ignore_headers Expires;
+    proxy_ignore_headers X-Accel-Expires;
+    proxy_ignore_headers Cache-Control;
+    proxy_ignore_headers Set-Cookie;
+
+    proxy_hide_header X-Accel-Expires;
+    proxy_hide_header Expires;
+    proxy_hide_header Cache-Control;
+    proxy_hide_header Pragma;
+
+    add_header X-Proxy-Cache $upstream_cache_status;
 
     location = /health {
             access_log off;
@@ -24,41 +34,24 @@ server {
         return 302 /public;
     }
 
-    location /login {
-        return 404;
-    }
-
-    location /register {
-        return 404;
-    }
-
-    location /jury {
+    location ~ ^/(login|register|jury|team) {
         return 404;
     }
 
-    location /team {
-        return 404;
-    }
-
-    location /images {
-        proxy_cache_valid any 10m;
-        proxy_pass ${DOMJUDGE_URL}/images;
-    }
-
-    location /flags {
+    location ~ ^/((images|flags|css|js|style_domjudge.css|webfonts|favicon.ico).*) {
         proxy_cache_valid any 10m;
-        proxy_pass ${DOMJUDGE_URL}/flags;
+        proxy_pass ${DOMJUDGE_URL}/$1;
     }
 
     location / {
-        proxy_set_header Accept-Encoding "";
-
         sub_filter '<a class="btn btn-info btn-sm justify-content-center" href="/login">\n' '';        
         sub_filter '<i class="fas fa-sign-in-alt"></i> Login\n' '';        
         sub_filter_once off;   
 
         set $args $args&static=yes;
 
+        proxy_set_header Accept-Encoding "";
+
         proxy_cache_valid any 1m;
         proxy_pass ${DOMJUDGE_URL};
     }