feat: add panopticon(attic cache server)

Signed-off-by: gwg313 <gwg313@pm.me>

attic client

Signed-off-by: gwg313 <gwg313@pm.me>

hosts/vault-tec/routes.nix

@@ -0,0 +1,20 @@
+{
+  imports = [
+    ./services.nix
+  ];
+  services.traefik = {
+    dynamicConfigOptions = {
+      http = {
+        routers = {
+          attic_local = {
+            entryPoints = [ "websecure" ];
+            rule = "Host(`cache.gwg313.xyz`)";
+            service = "attic_local";
+            tls.certResolver = "le";
+            middlewares = [ "headers" ];
+          };
+        };
+      };
+    };
+  };
+}