fix(@angular/ssr): prioritize options over environment variables in AngularNodeAppEngine

Prioritize constructor options over environment variables when initializing the AngularNodeAppEngine. Previously, environment variables took priority and blindly overrode the constructor options if they were defined in the environment. Now, explicit constructor options act as the override, while the environment variables serve as a fallback.

(cherry picked from commit 5875b60)

Author: alan-agius4

packages/angular/ssr/node/src/app-engine.ts

@@ -38,8 +38,8 @@ export class AngularNodeAppEngine {
   constructor(options?: AngularNodeAppEngineOptions) {
     const appEngineOptions: AngularAppEngineOptions = {
       ...options,
-      allowedHosts: getAllowedHostsFromEnv() ?? options?.allowedHosts,
-      trustProxyHeaders: getTrustProxyHeadersFromEnv() ?? options?.trustProxyHeaders,
+      allowedHosts: options?.allowedHosts ?? getAllowedHostsFromEnv(),
+      trustProxyHeaders: options?.trustProxyHeaders ?? getTrustProxyHeadersFromEnv(),
     };
 
     this.angularAppEngine = new AngularAppEngine(appEngineOptions);