refactorings

angular.json

@@ -35,12 +35,7 @@
               }
             ],
             "styles": ["src/styles.scss"],
-            "scripts": [],
-            "server": "src/main.server.ts",
-            "prerender": true,
-            "ssr": {
-              "entry": "src/server.ts"
-            }
+            "scripts": []
           },
           "configurations": {
             "production": {
@@ -84,7 +79,7 @@
         "serve": {
           "builder": "@angular-devkit/build-angular:dev-server",
           "options": {
-            "port": 3000
+            "port": 4200
           },
           "configurations": {
             "production": {