Introduce agenix secrets management

flake.lock

@@ -1,5 +1,48 @@
 {
   "nodes": {
+    "agenix": {
+      "inputs": {
+        "darwin": "darwin",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1682101079,
+        "narHash": "sha256-MdAhtjrLKnk2uiqun1FWABbKpLH090oeqCSiWemtuck=",
+        "owner": "ryantm",
+        "repo": "agenix",
+        "rev": "2994d002dcff5353ca1ac48ec584c7f6589fe447",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ryantm",
+        "repo": "agenix",
+        "type": "github"
+      }
+    },
+    "darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "agenix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1673295039,
+        "narHash": "sha256-AsdYgE8/GPwcelGgrntlijMg4t3hLFJFCRF3tL5WVjA=",
+        "owner": "lnl7",
+        "repo": "nix-darwin",
+        "rev": "87b9d090ad39b25b2400029c64825fc2a8868943",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lnl7",
+        "ref": "master",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
     "nixos-exporter": {
       "inputs": {
         "nixpkgs": [
@@ -54,6 +97,7 @@
     },
     "root": {
       "inputs": {
+        "agenix": "agenix",
         "nixos-exporter": "nixos-exporter",
         "nixpkgs": "nixpkgs",
         "nixpkgs-schule": "nixpkgs-schule",