Refactor appsettings.json structure

Reorganized the JSON structure by removing the "Endpoints" section and moving the "OpenIdConnect" configuration outside of it. The key-value pairs for "OpenIdConnect" remain unchanged, and the HTTP port number has been removed.

#87

Author: ziagham

src/appsettings.json

@@ -9,13 +9,13 @@
   "Endpoints": {
     "http": {
       "Port": 6264
-    },
-    "OpenIdConnect": {
-      "Authority": "<YOUR-AUTHORITY-URL>",
-      "ClientId": "<YOUR-CLIENT-ID>",
-      "ClientSecret": "<YOUR-CLIENT-SECRET>",
-      "RedirectUri": "/signin-oidc",
-      "RequireHttps": false
     }
+  },
+  "OpenIdConnect": {
+    "Authority": "<YOUR-AUTHORITY-URL>",
+    "ClientId": "<YOUR-CLIENT-ID>",
+    "ClientSecret": "<YOUR-CLIENT-SECRET>",
+    "RedirectUri": "/signin-oidc",
+    "RequireHttps": false
   }
 }