cli: add config schema for frontend listening config + fix usage

packages/cli/package.json

@@ -169,6 +169,22 @@
             "visibility": "frontend",
             "description": "Tracking ID for Google Analytics",
             "example": "UA-000000-0"
+          },
+          "listen": {
+            "type": "object",
+            "description": "Listening configuration for local development",
+            "properties": {
+              "host": {
+                "type": "number",
+                "visibility": "frontend",
+                "description": "The host that the frontend should be bound to. Only used for local development."
+              },
+              "post": {
+                "type": "number",
+                "visibility": "frontend",
+                "description": "The port that the frontend should be bound to. Only used for local development."
+              }
+            }
           }
         }
       }

packages/cli/src/lib/bundler/server.ts

@@ -26,9 +26,9 @@ export async function serveBundle(options: ServeOptions) {
   const url = resolveBaseUrl(options.frontendConfig);
 
   const host =
-    options.config.getOptionalString('app.listen.host') || url.hostname;
+    options.frontendConfig.getOptionalString('app.listen.host') || url.hostname;
   const port =
-    options.config.getOptionalNumber('app.listen.port') ||
+    options.frontendConfig.getOptionalNumber('app.listen.port') ||
     Number(url.port) ||
     (url.protocol === 'https:' ? 443 : 80);