nextcloud: add cache-control headers to static assets

data/nextcloud/nginx.conf

@@ -11,6 +11,9 @@
 
     location ~ \.(?:css|js|mjs|svg|gif|png|jpg|ico|wasm|tflite|map)$ {
         try_files $uri /index.php$request_uri;
+        # 182 days, 14 hours, 54 minutes, 23 seconds. I have no clue why
+        # this exact value, but i copied it from the example config.
+        add_header Cache-Control "public, max-age=15778463, $asset_immutable";
 
         location ~ \.wasm$ {
             default_type application/wasm;
@@ -29,3 +32,10 @@
     location / {
         try_files $uri $uri/ /index.php$request_uri;
     }
+
+    # cursed shit, use like this to have the 'map' feature outside the regular nginx config
+}
+
+map $arg_v $asset_immutable {
+    "" "";
+    default "immutable";