improve caddy config

flake.lock

@@ -109,6 +109,30 @@
         "type": "github"
       }
     },
+    "cloudflare-ipv4": {
+      "flake": false,
+      "locked": {
+        "narHash": "sha256-V4dThTb8iw02hjngubVtSJbEeWgOS1e/ODt1fLjLZvk=",
+        "type": "file",
+        "url": "https://www.cloudflare.com/ips-v4"
+      },
+      "original": {
+        "type": "file",
+        "url": "https://www.cloudflare.com/ips-v4"
+      }
+    },
+    "cloudflare-ipv6": {
+      "flake": false,
+      "locked": {
+        "narHash": "sha256-BgpkXCAh/MmK3GTAElKiGJctCYUN+/UgvpuawqGmitE=",
+        "type": "file",
+        "url": "https://www.cloudflare.com/ips-v6"
+      },
+      "original": {
+        "type": "file",
+        "url": "https://www.cloudflare.com/ips-v6"
+      }
+    },
     "crane": {
       "locked": {
         "lastModified": 1745454774,
@@ -992,6 +1016,8 @@
     "root": {
       "inputs": {
         "authentik-nix": "authentik-nix",
+        "cloudflare-ipv4": "cloudflare-ipv4",
+        "cloudflare-ipv6": "cloudflare-ipv6",
         "firefox-addons": "firefox-addons",
         "flake-parts": "flake-parts_2",
         "hardware": "hardware",