try simple cryptpad module

machines/public-cof/cryptpad.nix

@@ -14,9 +14,15 @@ in
   environment.etc."cryptpad/config.js".source = ./cryptpad.js;
 
   services.nginx.virtualHosts = {
-    "docs.beta.rz.ens.wtf" = {
+    "pads.beta.rz.ens.wtf" = {
       forceSSL = true;
       enableACME = true;
+      locations = {
+        "/" = {
+          proxyPass = "http://localhost:3000";
+        };
+      };
+      /*
       extraConfig = ''
         # CryptPad serves static assets over these two domains.
         # `main_domain` is what users will enter in their address bar.
@@ -183,6 +189,7 @@ in
         # Finally, serve anything the above exceptions don't govern.
         try_files /www/$uri /www/$uri/index.html /customize/$uri;
       '';
+      */
     };
   };