nginx sample config, quickly tested

installation/pleroma.nginx

@@ -1,3 +1,6 @@
+proxy_cache_path /tmp/pleroma-media-cache levels=1:2 keys_zone=pleroma_media_cache:10m max_size=10g
+                 inactive=720m use_temp_path=off;
+
 server {
        listen         80;
        server_name    example.tld;
@@ -21,6 +24,13 @@ server {
     location / {
         proxy_pass http://localhost:4000;
     }
+
+    location /proxy {
+        proxy_cache pleroma_media_cache;
+        proxy_cache_lock on;
+        proxy_pass http://localhost:4000;
+    }
+
     include snippets/well-known.conf;
 
-}
+}