add customer angular gui skeleton

customer/app/package-lock.json

@@ -498,14 +498,6 @@
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@@ -1533,6 +1525,11 @@
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@@ -5991,6 +5988,11 @@
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       "dev": true
     },
+    "ngx-bootstrap": {
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+      "resolved": "https://registry.npmjs.org/ngx-bootstrap/-/ngx-bootstrap-5.0.0.tgz",
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