configure vite port for preview - affecting health check & networking

Author: smalho01

dockerRunnerProd.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
 cd frontend
+npm run build
 ( npm run preview ) & SERVER_PID=$!
 
 cd ../backend

frontend/vite.config.ts

@@ -9,7 +9,9 @@ export default defineConfig({
   base: '',
   plugins: [react()],
   preview: {
-    allowedHosts: ['.mitre.org', '.elb.us-east-1.amazonaws.com']
+    allowedHosts: ['.mitre.org', '.elb.us-east-1.amazonaws.com'],
+    port: parseInt(process.env.PORT!), 
+    host: true,  
   },
   define: {
     'process.env': process.env