Add env.js for develop

diagram.json

@@ -1,36 +1,4 @@
 {
-  "nodes": [
-    {
-      "id": "1",
-      "type": "custom",
-      "data": {
-        "label": "ArgoCD",
-        "icon": "https://s3.dvirlabs.com/lab-icons/argocd.svg"
-      },
-      "position": {
-        "x": 100,
-        "y": 100
-      }
-    },
-    {
-      "id": "2",
-      "type": "custom",
-      "data": {
-        "label": "Gitea",
-        "icon": "https://s3.dvirlabs.com/lab-icons/gitea.svg"
-      },
-      "position": {
-        "x": 300,
-        "y": 200
-      }
-    }
-  ],
-  "edges": [
-    {
-      "id": "e1-2",
-      "source": "1",
-      "target": "2",
-      "animated": true
-    }
-  ]
+  "nodes": [],
+  "edges": []
 }

frontend/.gitignore

@@ -22,3 +22,6 @@ dist-ssr
 *.njsproj
 *.sln
 *.sw?
+
+# Custom
+public/env.js

frontend/src/assets/default.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="64" height="64" viewBox="0 0 24 24" fill="none" stroke="gray" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+  <rect x="3" y="3" width="18" height="18" rx="2" ry="2" />
+  <path d="M3 9h18M9 21V9" />
+</svg>