Update dependency @angular/core to v15

api/deploy/nginx.conf

@@ -24,8 +24,8 @@ http {
     index   index.html index.htm;
 
     server {
-        listen       81 default_server;
-        listen       [::]:81 default_server;
+        listen       80 default_server;
+        listen       [::]:80 default_server;
         server_name  homeserver.flokaiser.com;
         root         /var/www/html;
 

frontend/package.json

@@ -12,14 +12,14 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "~15.0.0",
+    "@angular/animations": "~14.2.0",
     "@angular/cdk": "^15.0.0",
-    "@angular/common": "~15.2.0",
-    "@angular/compiler": "~15.0.0",
+    "@angular/common": "~14.2.0",
+    "@angular/compiler": "~14.2.0",
     "@angular/core": "~15.0.0",
     "@angular/forms": "~15.0.0",
     "@angular/material": "^15.0.0",
-    "@angular/platform-browser": "~15.0.0",
+    "@angular/platform-browser": "~14.2.0",
     "@angular/platform-browser-dynamic": "~15.0.0",
     "@angular/router": "~15.0.0",
     "bootstrap": "^5.1.3",
@@ -31,16 +31,16 @@
   "devDependencies": {
     "@angular-devkit/build-angular": "~15.0.0",
     "@angular-eslint/builder": "15.1.0",
-    "@angular-eslint/eslint-plugin": "15.1.0",
+    "@angular-eslint/eslint-plugin": "14.1.2",
     "@angular-eslint/eslint-plugin-template": "15.1.0",
     "@angular-eslint/schematics": "15.1.0",
     "@angular-eslint/template-parser": "15.1.0",
-    "@angular/cli": "~15.0.0",
-    "@angular/compiler-cli": "~15.0.0",
+    "@angular/cli": "~14.2.0",
+    "@angular/compiler-cli": "~14.2.0",
     "@types/jasmine": "~4.3.0",
     "@types/node": "^18.0.0",
-    "@typescript-eslint/eslint-plugin": "5.46.1",
-    "@typescript-eslint/parser": "5.46.1",
+    "@typescript-eslint/eslint-plugin": "5.39.0",
+    "@typescript-eslint/parser": "5.40.1",
     "eslint": "^8.15.0",
     "jasmine-core": "~4.5.0",
     "karma": "~6.4.0",