vaultwarden: use static ipv4 localhost in nginx

* fixes iog cache

Author: disassembler

nixos/optina/configuration.nix

@@ -893,7 +893,7 @@ in
           useACMEHost = "lan.disasm.us";
           forceSSL = true;
           locations."/" = {
-            proxyPass = "http://optina.lan.disasm.us:8000";
+            proxyPass = "http://127.0.0.1:8000";
             extraConfig = ''
               proxy_set_header Host $host;
               proxy_set_header X-Forwarded-Proto $scheme;

nixos/valaam/configuration.nix

@@ -120,7 +120,7 @@ in {
     settings.sandbox = true;
     settings.cores = 4;
     settings.extra-sandbox-paths = [ "/etc/nsswitch.conf" "/etc/protocols" ];
-    settings.substituters = [ "https://cache.nixos.org" "https://hydra.iohk.io" ];
+    settings.substituters = [ "https://cache.nixos.org" "https://cache.iog.io" ];
     settings.trusted-public-keys = [ "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=" ];
     package = pkgs.nixUnstable;
     extraOptions = ''