fix: support default and reqHandler exports in Angular

Updated the export structure to ensure both `default` and `reqHandler` exports function when using Angular.

Author: alan-agius4

src/frameworks/angular/index.ts

@@ -243,19 +243,24 @@ exports.handle = function(req,res) {
 };\n`;
   } else if (serverOutputPath) {
     bootstrapScript = `
-    const app = new Promise((resolve) => {
+    const app = new Promise((resolve, reject) => {
       setTimeout(() => {
         const port = process.env.PORT;
         const socket = 'express.sock';
         process.env.PORT = socket;
-        
+
         ${
           serverEntry?.endsWith(".mjs")
             ? `import(\`./${serverOutputPath}/${serverEntry}\`)`
             : `Promise.resolve(require('./${serverOutputPath}/${serverEntry}'))`
-        }.then(({ app }) => {
-          process.env.PORT = port;
-          resolve(app());
+        }.then(({ default: defHandler, reqHandler, app }) => {
+          const handler = app?.() ?? reqHandler ?? defHandler;
+          if (!handler) {
+            reject(\`The file at "./${serverOutputPath}/${serverEntry}" did not export a valid request handler. Expected exports: 'app', 'default', or 'reqHandler'.\`);
+          } else {
+            process.env.PORT = port;
+            resolve(handler);
+          }
         });
       }, 0);
     });